BULLETIN No. 207 DECEMBER, 1918 ALABAMA Agricultural Experiment Station OF THE Alabama Polytechnic Institute AUBURN Local Fertilizer Experiments With Cotton in South Alabama, 1914-1918, Inclusive. By J. T. WILLIAMSON and J. F. DUGGAR 1918 Post Publighing Company, Opelika, Ala. EXPERIMENT STATION STAFF C. C. THACH, President of the College J. F. DUGGAR, Director of Experiment Station. .AGRICULTURE: HORTICULTURE: J. F. Duggar, Agriculturist. E. F. Cauthen, Agriculturist. M. .. Funchess, Associate. G. C. Starcher, Horticulturist. J. C. C. Price, Associate. C. L. Isbell, Assistant. ENTOMOLOGY: .J. T. Williamson, Field Agt. UI. B. Tisdale, Associate Plant Breeder. 0. H. Sellers, Assistant. 3M. H. Pearson, Assistant. 'VETERINARY C. A. CHEMISTRY: SCIENCE: W. F. Hinds, Entomologist. F. L. Thomas, Assistant. J. M. Robinson, Assistant. ANIMAL Cary, Veterinarian. HUSBANDRY: B. B. Ross, Chemist. E. R. Miller, Chemist, Soils and' Crops. C. L. Hare, Physiological Chemist. G. .S. Templeton, Animal Husban dman. E. Gibbens, Assistant. G. L. Burleson, Assistant. F. W. Burns, Assistant. AGRICULTURAL BOTANY : W. A. Gardner, Botanist. Stratton, Assistant. ENGINEERING: Agricultur~al Robert G. L. ogist. Engineer. EDITOR: PLANT PATHOLOGY: Peltier, Plant Pathol- Leslie L. Gilbert. LOCAL FERTILIZER EXPERIMENTS WITH COTTON IN SOUTH ALABAMA, 1914-1918, INCLUSIVE BY J. T. WILLIAMSON and J. F. DUGGAR SUMMARY This bulletin records the results of fertilizer experiments with cotton conducted by the Local Experiment Division of the Alabama Experiment Station in the counties of the southern half 'of Alabama from 1914 to 1918, inclusive. A comparison of cotton seed meal and acid phosphate shows that the average increase attributable to cotton seed meal was greater than the average increase due to acid phosphate on 68 per cent of the 44 conclusive experiments on Coastal Plain soils; equal to acid phosphate on 16 per cent; and less than the average increase due to acid phosphate on 16 per cent. Cotton seed meal gave an average increase greater than did kainit on 73 per cent of the experiments. It was about equal to kainit on 7 per cent, and less than kainit on 20 per cent of the experiments. In 52 per cent of the tests acid phosphate made an average increase greater than the average increase due to kainit. It was equal to kainit on 14 per cent, and less than kainit on 34 per cent. An average of the results obtained from the 44 conclusive experiments mentioned above shows that when cotton seed meal is taken as a basis the relative increases in crop due to 200 pounds cotton seed meal, 240 pounds acid phosphate or 200 pounds kainit* is as 100 to 45 to 34, respectively. However, an average of a much greater number of experiments covering a period from 1911 through 1918 shows potash as of much more importance, and acid phosphate slightly more important than here indicated. One hundred pounds of kainit per acre when applied in a complete fertilizer was nearly as effective, and, on 154 the average *more profitable, than, was two hundred pounds. The average of these 44 conclusive experiments shows that 100 pounds of nitrate of soda applied when the plants were six to eight inches tall to make a complete fertilizer was slightly more effective than was an application of 200 pounds of cotton seed meal applied in a complete fertilizer before planting. The largest average;increase and largest average profit secured on these 44 tests came from a per acre application of the following fertilizers:,. 240 pounds acid phosphate ~bfr lnig lnig bfr 100 pounds kainit 100 pounds nitrate of soda, when plants.-were 6 t 8 inches tall. o Average Yield and Average Increase on 44 Experiments Made on Coastal Plain Soils in South Alabama 04 ponsai N o o o~ 6 % Lbs.. 200 FERTILIZER KINDUOF 0 5) CIO 0 a 1 2 3 .240 4 Cotton seed Acid No fertilizer phosphate meal- Lbs. Lbs. 140 -- 632 --- 200 200 200 200 240 Acid 6 Kainit*_Cotton seed meal -- 566 491 553 686 673 503 621 729 727 506, 73 58 7 S phosphate -Cotton seed meal Kainit*-------No fertilizer 189 173 111 224 221 S 200 Kainit* -_ ( 200 Cotton seed meal 9 240 Acid phosphate _ 200 Kainit*-------200 Cotton seed meal 10 240 Acid phosphate 100 Kainit* --___ 11 ~~No fertilizer____ S 240_ Acid phosphate _. 12 81 240 Acid pbosphate_. -- 233 100 100 Kainit*------'Nitrate 739' of soda~~ *Due to scarcity of kainit, equivalent amounts of other potash fertilizersused- instead ofkainit in years. some 155 INTRODUCTORY. · The chief object of these local fertilizer experiments or soil tests has been to ascertain the best combination of fertilizers for cotton, growing on each of the principal soils of the southern half of Alabama. The results recorded in this bulletin were obtained in fertilizer experiments conducted with funds appropriated by the Legislature of Alabama, in February 1911, to the Experiment Station for making local experiments with crops, fertilizers, fruits, live stock, insects, plant diseases, etc. This bulletin deals with fertilizer experiments carried to a conclusion in 1914-15-16-17-18 in the southern lalf of the State. For convenience the counties grouped together in this bulletin are those lying within or wholly south of the Central Prairie or Lime Region. The results of fertilizer experiments made in the counties lying north of the Central Prairie Region will appear in a later bulletin of this Station, Local fertilizer tests constitute only one of many lines of experiments instituted in 1911 by the Alabama Experiment Station with the support of State funds. Local fertilizer experiments as now conducted are made by farmers especially recommended as being men likely to take the necessary pains to secure accurate results. Small lots of carefully weighed and mixed fertilizers were supplied to each experimenter. Detailed instructions as to how to conduct the experiment and blank forms for reporting results were also furnished. Representatives of the Station inspected the experiments here published as often as practicable. The directions sent to each experimenter stated that the land employed for this test should be level and uniform, not manured in recent years, not in cowpeas the preceding year, and that it should be representative of large soil areas in its vicinity. In order to meet these conditions it was often necessary to select very old, "run-down" cotton land on which no effort for improvement had been made. The need of perfect uniformity and standard treatment for all plots (except as to kind of fertilizer used) was emphasized. Fertilizers were applied in the usual manner--that is, drilled before planting, except nitrate of soda which 156 was directed to be applied when the plants were 6 to 8 inches high. Bulletins thus far published in this series detailing the results of local fertilizer experiments with cotton on this uniform plan are the following: For South Alabama-Bulletins No. 160, 169 and 174. For North Alabama-Bulletins No. 162, 170 and 175. The experiments with corn are detailed in bulletins 181 and 182 on exactly the same plan as the fertilizer experiments with cotton. FIELD EXPERIMENTS REPEATED OFTEN, THE ONLY MEANS OF DETERMINING WHAT FERTILIZERS A GIVEN TYPE OF SOIL REQUIRES. The reader should bear in mind that there are great numbers of different soils in Alabama, and that even the same soil would give different results in different years, depending on how it had been cropped, fertilized and cared for in the year or two immediately preceding the test. It is the purpose of the authors in later years to publish bulletins classifying the soils on which all these tests are made and drawing conclusions relative to the needs of each class of soils. However, before this can be safely done, these, experiments must be often repeated, so that the average results may teach clearly the fertilizer requirements of each distinct type of soil. Averaging the results obtained on dissimilar soils will not afford the desired information. Neither will chemical analysis of the soil indicate what fertilizers are needed. 157 WEATHER CONDITIONS. The average rainfall in the part of Alabama covered by these experiments is given below by months, according to data furnished by the Alabama Weather ,.Service: 1914 1915' 1916 1917 1918 Av. 1911-1919 January 2.26 February ----------- 4.72 March _____-_____--- 2.85 April _____--____-3.11 May----------------0.85 June --------------- 2.45 July --------------- 3.89 August ------------- 6.76 September ---------- 6.02 October- _______---__- 2.71 November _---___- 4.99 December-________ 4.39 ------------ 7.07 3.37 5.28 4.23 3.29 3.19 0.50 3.32 6.79 4.16 4.26 3.09 4.92 17.23 4.33 4.26 4.40 2.27 5.10 1.89 2.27 2.95 5.73 4.35 5.96 5.13 2.90 7.81 6.48 2.27 0.90 8.11 1.86 2.36 6.24 2.28 3.92 3.76 3.3& 3.57 4.96* 6.39 8.16 1.14 1.25 2.01 5.2.5 4.13 5.05 8.41 7.04 5.73 Total 12 months. 45.00 53.94 54.31 51.21 58.28 *Exclusive of 1916 rainfall. Including 1916 rainfall for July was 6.50 inches. The total rainfall for the months of May, June, Julyand August is probably the most important climatic. factor in determining the yield of cotton under boll weevil conditions. For this reason it is interesting compare the monthly in Alabama for these months during the last. eightyears. In consideration of seasonal rainfall with the average rainfall to remembered that the' total rainfall for a given month,. or even for the growing season, may give misleading information, in that the actual distribution of the is not taken into account.. For example, July 1919 rainfall it should be fall rain- at Auburn would probably be classed as a very dry month, but the total inches, as compared with a seven year's. average of 4.96 inches for the whole of south Alabama, but 3.96, inches of the July rainfall for' that month was 4.63 July 24 and 28, inclusive, leaving :67 of an inch as the rainfall for the remaining 26 days of the month. rainfall at Auburn fell between -158 LOCATION OF EXPERIMENTS County Autauga ---- Post Off ice Autaugaville Page Name W. G. Pickett----------------175 Autauga ___Prattville Eufaula BaibourUnionSprings BullockButler-------Georgiana -Butler Butler_Choctaw Clarke Greenville. ----Greenville --- W. A. Wadsworth------------177 L. B. Green-----------------224 S. P. Rainer, Jr.-237 210 J. T.Porter--_-_-----E. L. Graydon---------204-206 W. C. Walton----------------208 -- Clarke------Thomasville - R. L. Hearron----------------190 Elba-------- T. P.'Windham--------------237 Coffee ----- 216 --- W. F. Chandler Conecuh ---- Evergreen Conecuh Crenshaw Crenshaw _--.Herbert G ------ rove - Lisman ---Hill J. L.Covington--------------235 91-193 J. Winters Calhoun --- -- -BrantleyA---A. -Luverne _ - 211-214 G. M. Harper --- C. Causey-------------220-222 237 ------F. L. Hawkins- Dale---------Ozark ------- J. W. Byrd------------------227 Dale-------- Ozark-------A. L. Carr------------------225 Dallas ------- Selma ------ W. J. Templin------------173-174 235 C. Kirkpatrick ------Dallas -------- Cahaba Elmore Elmore ---- Eclectic Eclectic --- H. D. Templeton----------178-180 0. C. Johnson -- ------ 237 Escambia .,Nokomis _N.B. Escambia Geneva Greene ---- Rhodes----------------218 J. A. Dees-------------------235 Eutaw ----Eutaw------W. H. Myers-----------------239 Greene ----J. R. Holbrook---------------170 Hale -------- Akron Hale--------Newbern ____B. L. Allen-----------------239 237 Abbeville -== J. B. Espy-------------:Henry ------M. A. Creel------------------228 ------ Headland E. Tippen-----------------237 Brewton _--J. Hartford --- Geneva Cu. High School -- -237 ----- :Henry- ;Henry-------Headland C. F ---... Headland ie__.D B. Mitchell, Jr. -------------- 166 . J. Letohatce Lowndes ---Tuskegee W. C. Hardwick-------------- 182 W. J. Bridges----------------_184 Houston C. Jarvis-----------__-_230 Wilkerson --------------- 231 162 - .Macon Macon_-__Notasulga Mar; ngo Marego Tomason -Thomastonroy-- _- -- Monroeville MonroeMarngo.Tomato -----L. 0. Crocker---------J. S. Phillips----------------- J. R. Monroe .. Monroeville - J. L. Holloway-----------------188 0. Carter15-8 239 Montgomery Montgomery Montgomery Montgomery --- W. H. - Hamburg Perry-Perry,- ------ _Mrion ---- ---- --- 164 J. H. R. H. Woodfin ---- -- - ---- -- -- 172 C. McGehee M. Claxton-----------------165 ----------- 167-169 Lee------& T. Pike -- -- -- -Pike,,--------.Troy-------- Sme ---- Washington Wilcox Wilcox--- Leroy---W. F. Melton----------------195 Cua--WH.Sehn----25Wa G. Pearson ----------------- 239 ---------- --------Leroy--------R. G. M. Cook Camden __ A. McGee Catherine - R. F. Chappell ------------- T. W. H. Curtis ----------------- V. Ballard---------222 237 Wilcox -- McWilliams ___.J. --------------- 197 - -239 198-203 159 Experiments were begun, in the. counties named below, but for reasons satisfactorily explained at the time they were )t carried to a conclusion. County Post Office Name Year Autauga ___Prattville ___P. H. GrahamA914 Autauga ____Prattville A. Wadsworth----------1915 Barbour _.. Comr ------ Mitchell Bros. and Wright 1914 Barbour -.. ComerBros. and Wright _1915 Barbour --Eufaula L. B. Greene_1914 Bullock Three Notch A. B. Shehee-1914 Bullock ._...UnionSpringsA. H. Feagin__ __1914 Clarke -----. Thomasville R. L. Hearron-1914 Coffee -----Enterprise _T. T. Brooks-1914 n ___W. Mitchell 1--- ------ P. Windham ----T. 914 ---- Elba ------ P. Windham T. -- 1915 Covington ..Opp ------- G. Chambless------------1914 W. Coffee Coffee _ _-.Elba Covington Covington -_.W. N. Rushton--------------1914 -.Andalusia ___W. N. Rushton--------------1915 Dale--------Ozark N. A. Creel -----1916 Elmore Eclectic ___-O. C. Johnston--------------1914 Escambia Brewton ____J. B. Tippin----------------1914 Escambia ..NAdokomis B. Rhodes---------------1915 Geneva .....- lHartford ____J. C. Blaylock--------------1914 Geneva -.-Hartford ____S. G. Burch----------------1917 Hale--------Greensboro A. S. Douglas---------------1915 Houston Dothan W. R. Pittman--------------1914 Lowndes ____Burkville ___J. H. Chestnut--------------1914 Lowndes ___ LowdeasboroC. E. Reese----------------1915 ----- -.- ndalusia A --- --N. __J. ---- -----J. Macon------- Tuslkegee Macon ------ Tuskegee M. Roberts-------------__1915 M. Roberts Marengo Marengo Marengo --- Linden Monroe--Monroeville ----..Demopolis __T. -B. Demopolis --------------- 1916 C. Brown ---------------R. Walton Perry Pike-------- Pike------Pronto Pike Russell-_Seale E. Buntin----------------1914 ---..~Troy-------- C. F. Copeland--------------_1915 Troy ~W. Hamburg -__ __J. --- -___J. Scogin----------------_1914 T. B. F. McArthur------------- --------------- 1914 1916 1916 1914 H. Lee------------------'1916 Ledbetter--------------- Russell Sumter ---- Cottonton Cuba _-Cuba Sumter Sumtec Wilcox - Geiger Sumter---.Geiger Sumter ... Geiger '..Leroy ----- E. __W. ------- R. ------ A. ---- ----- G.A. V. Kelly-----------------_1914 G. Martin---------------_1915 Gilbert ---------------- L. Stephens--------------_1916 _B--E.A. W. H. Stephens------------- 1914 1914 Washington -------W. __G. ------ A. J. Payne----------------_1914 J. Payne-----------------_1915 F. Melton---------------- _v__Camden M. Cook------------------ 1914 1916 160 THE FERTILIZERS USED The prices given below are used as representing about the average cash prices of fertilizers in local markets for the years 1914, 1915, 1916, 1917 and 1918: Fertilizer Cotton seed meal Nitrate of soda-----------60.00 Acid phosphate----------14.00 Kainit (12.5% K 2 0)---------14.00 1915 -3.00 30.00 60.00 14.00 22.60 1914 35.00 75.00 17.50 1916 1917 50.00 1918 55.00 80.00 100.00 18.00 21.00 140.00 140.00 Alkali Salts (22% K20) 121.00 Prices naturally varied in different localities. In fact, during the past few years some of these fertilizers were not on the local markets, one of which was kainit in 1916, 1917 and 1918. Anyone caring to do so may substitute the price of fertilizer in his locality for the price given above. In each experiment three plots were left unfertilized, these being Plots 3, 7 and 11. When these yields differed widely the experiment was classed as inconclusive. The increase on Plots 4 to 6 is calculated on the assumption that the gradation in fertility is uniform from Plots 3 to 7; likewise the increase is calculated for Plots 8 to 10 inclusive.* PRICE ASSUMED FOR SEED COTTON The prices assumed for seed, for lint, the cost of ginning and picking, and the value of the increase in seed cotton are given below. Year - Ir y ° 0 20 0q~ CZ 0c~ 1$ CentsCentsCents 1914----------------116.00 6.8 0.6 2.2 1915---------30.00 12.0 0.6 4.4' 1916---------------- 50.00 20.0 0.6 7.7 1917---------67.50 28.0 0.6 11.0 1918 68.00 30.0 1.3 1 11.0 *For the standard method employed in this bulletin for Galculating the increased yields, see Alabama Station Bulletin No. 160 or 162. 161 In calculating the value of the increase, take for instance, prices in 1918. The price assumed is $68.00 per ton for seed and 30 cents per pound for lint. This is equal to 12.3 cents per pound for seed cotton, turning out 33 1-3 per cent lint. Deducting 1.3 cents per pound for picking and ginning, we have 11 cents as the net value per pound of the increase in seed cotton due to fertilizers. COMPOSITION OF FERTILIZERS The composition of 100 pounds of each mixture used on the different plots in all years is tabulated below: Plot 1. 6.79 lbs. nitrogen; 2.88 lbs.*phos. acid; 1.77 lbs. potash. 2. -------------; 16.00 lbs. phos. acid; ----4. --------------------------------12.30 lbs. potash. 5. 3.09 lbs. nitrogen; 10.04 lbs. phos. acid; 0.80 lbs. potash. 6. 3.39 lbs. nitrogen; 1.44 lbs. phos. acid; 7.03 lbs. potash. 8. ; 8.73 lbs. phos. acid; 5.59 lbs. potash. 9. 2.12 lbs. nitrogen; 6.90 lbs. phos. acid; 4.40 lbs. potash. 10. 2.59 lbs. nitrogen; 8.18 lbs. phos. acid; 2.93 lbs. potash. 12. 3.18 lbs. nitrogen; 8.73 lbs. phos. acid; 2.80 lbs. potash. *Counting all of the phosporic acid in cotton seed meal as available. Exceptions to the above should be noted as follows: Cottonseed meal containing 71/2 and 7 per cent ammonia was used in 1916 and in 1918, respectively. Also, in 1918, alkali salts which was supposed to be equivalent to 200 pounds of kainit did not come up to the claimed analysis of 22 per cent. Those who are more accustomed to the word ammonia than to the term nitrogen, may change the figures for nitrogen into their ammonia equivalents by multiplying by 1 3/14. 162 COUNTY, 6 MILES SOUTH OF THOMASTON. L. O. CROCKER-1918. Typical "post-oak" soil, with stiff subsoil. The land on which this experiment was located had been in cultivation about five years. Oak and shortleaf pine trees originally grew here. This experiment had to be planted a second time, the last planting being made on May 12. Boll weevils are reported to have cut the yield to a considerable extent. In 1917, the land was planted to cotton; and in 1916, corn was grown on this soil. The largest profit, $14.40 per acre, was made on Plot 2, which was fertilized with 240 pounds acid phosphate alone. However, the largest increase, 228 pounds of seed cotton per acre, was made on Plot 9, where a complete fertilizer containing 200 pounds cottonseed meal, 240 pounds acid phosphate and 120 pounds alkali salts (equivalent to 200 pounds kainit) was used. The average increase due to 200 pounds cottonseed meal per acre was 60 pounds seed cotton per acre; to 240 pounds acid phosphate, 113 pounds; and to 120 pounds alkali salts (equivalent to 200 pounds kainit), 33 pounds seed cotton per acre. Cottonseed meal, applied before planting, was more effective by 146 pounds seed cotton per acre than was an equivalent amount of nitrate of soda, applied late (July 6). It is especially noticeable that acid phosphate increased the yields of this soil much more than did either cottonseed meal or alkali salts. The experiment was planted late, and it may be that the increase due to acid phosphate came because of the fact that phosphate usually causes early maturity, in this case causing the plants to set a considerable quantity of fruit before the boll weevil attack which is reported to have come early in August. In other years it is very-probable that either nitrogen or potash, or both, will produce much larger increases than they did this season. Increase of seed cotton per ccre when cottonseed meal was added: To unfertilized plot -----------------------64 Ibs. 0 lbs. To acid phosphate plot -------------------72 lbs. To kainit plot ---------------------------102 lbs. To acid phosphate and kainit plot-- --------60 lbs. Average increase with cottonseed meal- ----MARENGO Increase cotton per acre when acid phosphate added:To unfertilized plot-_ 152 To cottonseed meal plot----____- __----------88 To kainit. plotJ------------------------------90 To cottonseed meal and kainit plot------------120 Average increase with acid phosphate 113 Increase of seed cotton per acre when kainit was To unfertilized plot- _---------------------36 To cottonseed meal plot __--- ,ofseed was lbs. added: lbs. lbs.. lbs. lbs. lbs. 44 lbs. To acid phosphate plot ____6 lbs. To cottonseed meal and acid phophate plot 76 lbs. Average increase with kainit-33 lbs. Increase of seed cotton per acre from use of quantities of kainit: To use of 200 pounds kainit-----------------76 lbs. To use of 100 pounds kainit------------66 lbs. Increase from use of cottonseed meal in complete --- different fertilizer -------------- Cottonseed meat better than nitrate of soda by 102 lbs. 146 lbs. Experiments in Marengo and Perry Counties THOMASTON* HAMBURG 1918 0 o Ao 1915 0 z KIND OF Q FERTILIZER C U o 8 Q 21 C 0 Lbs. 1 200 2 3 240 200 mealAcid phosphate... Cotton seed Lbs. 280 Lbs. $ 64 1.54 Lbs.304 Lbs. $ -200 -11.80 368 152 36 4 No fertilizer-- -_ 216 Kainit------------ 264 -- -3.30 14.40 8.70 456 504 544 -----16 -1.56 --48 -3.79 48 -2.57 200 Cotton seed meal 240-acid phosphate _ 6 200 Cotton seed meal 6 200 Kainit_--__-_ No fertilizer 240 -.-- 392 30 30 264 368 152 600 66 600 480 18-.866 18 - .8 ___._ 7 8 9~ 10 11 12 200 phosphateKainit Acid -- ------86 -7.72 10 10 00 00 126 4.08 200 Cotton seed meal 24.0 Acid phosphate200 Kainit_- _______ 200 Cotton seed meal) 240 Acid 448 416 228 218 9.80 12.33 608 680 76 182 -3.60 2.20 100 Kainit 100 100 phosphate-- ~ ) 240 Acid, phosphate No fertiliz__---__ Kainit Nitrate of 176,------------- 464 72 -3.23 568 104 - -- soda-- 248 -1.23 *120 pounds alkali salts used instead of 200 pounds kainit as. source of potash in 1918. 164 PERRY COUNTY, 1 MILE WEST OF HAMBURG. J. H. LEE-1915. Black prairie lowland. This experiment was made on rich black prairie lowland which had been in cotton for the preceding three years, or longer. Boll weevils did considerable damage to the test, although no report is made of their having damaged any one plot more than they did any other plot. No fertilizer or combination of fertilizers was highly profitable on this soil in 1915, probably due to the excessive damage by weevils. Plot 10, receiving 200 pounds cottonseed meal, 240 pounds acid phosphate and 100 pounds kainit per acre, made an increase of 182 pounds seed cotton per acre, and a profit of $2.20. The average increase due to cottonseed meal was 41 pounds seed cotton per acre; to acid phosphate, only 16 pounds; while kainit at the rate of 200 pounds per acre produced an increase of 82 pounds seed cotton per acre. Cottonseed meal was more effective by 78 pounds seed cotton per acre when applied before planting in a complete fertilizer than was nitrate of soda applied June 8. Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot .. 200 lbs. To acid phosphate plot -96 lbs. To kainit plot 104 lbs. To acid phosphate and kainit plot lbs. Average increase with cottonseed meal -162 --- 41 lbs. Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot -- 48 lbs. To cottonseed meal plot 248 lbs. To kainit plot To cottonseed meal and kainit plot ------------------------------ 102 lbs. Average increase with acid phosphate ------ -44 lbs. 14 lbs. Increase of seed cotton per acre when kainit was added: To unfertilized plot 16 To cottonseed meal plot_-------320 To acid phosphate plot ----------------------38 To cottonseed meal and acid phosphate plot 28 Average increase with kainit --------------- lbs. lbs. lbs. lbs. 82 lbs. Increase of seed cotton per acre from use of different quantities of kainit: To use of 100 pounds kainit -134 Increase from use of cottonseed meal in complete fertilizer-- To use of 200 pounds kainit --------------- 28 lbs. lbs. lbs. -162 165 Increase from use of nitrate of soda--------------84 Cottonseed meal better than nitrate of soda by -- lbs. 78 lbs. MONTGOMERY COUNTY, 3 MILES SOUTHEAST OF HOPE HULL. W. M. CLAXTON ON THE FARM OF ALEX CLARKE-1915. Gray prairie soil. The poor prairie land on which this experiment was made was cropped to cotton in 1914. The largest profit, $12.52 per acre, was secured on Plot 6, fertilized with a mixture of 200 pounds cottonseed meal and 200 pounds kainit. This plot also made the largest increase in seed cotton per acre, although it was closely followed by Plot 9, fertilized per acre with 200 pounds cottonseed meal 240 pounds acid phosphate 200 pounds kainit. The second largest profit, $12.25 per acre, was secured on Plot 8, which received a mixture containing acid phosphate and kainit at the rates of 240 pounds and 200 pounds per acre, respectively. The average increase due to 200 pounds of cottonseed meal on this experiment was 128 pounds seed cotton per acre; to 240 pounds acid phosphate, 60 pounds seed cotton per acre; and to 200 pounds kainit, 242 pounds seed cotton per acre. Two hundred pounds of kainit was more effective than one-half this quantity by 80 pounds of seed cotton per acre. Increase of seed cotton per acre when cotton seed meal was added: To unfertilized plot To acid phosphate plot To kainit plot --- 160 lbs. 88 lbs. 232 lbs. 32 lbs. 128 lbs. Increase of seed cotton per acre when acid phosphate was added: 64 lbs. To unfertilized plot ------------------------8 lbs. To cottonseed meal plot --------------------- To acid phosphate and kainit plot------ Average increase with cottonseed meal ------ To kainit plot ---------------------------To cottonseed meal and kainit plot- -Average increase with acid phosphate To cottonseed meal plot ------ 196 lbs. -- 4 lbs. 62 lbs. 244 lbs Increase of seed cotton per acre when kainit was added: ,--------- lbs. 172 To unfertilized plot--To acid phosphate plot --------------------plot _. To cottonseed meal and acid Average increase with kainit hosphate -------------- 304 lbs. 248 lbs. 242 lbs. 166 increase of seed- cotton per ;acre front use different of kainit:; 28lbs. __-To use of 200 pounds kainit 168 __ To use of 100 pounds kainit Increase from use of cottonseed meal in complete fertilizer --32 lbs. Increase from use of nitrate of soda_-_ 80 lbs. Nitrate of soda better than cottonseed meal by 48 lbs. ties of quanti- - lbs. Experiments in Montgomery and Lowndes Counties HOPE HULL LETOHATCHIE 1915 1914 O O 0 O Z 4*- KIND OF > Lbs. 352 256 192 0° 4.FERTILIZER N 1 2 3 Lbs 200 Cotton seed meal 240 Acid phosphate---No fertilizer 5 ------- Lbs. $ 160 4.04 64 1.14 _701 Lbs. 1072 1416 968 Lbs. $ 368 5.10 712 _- 13.98 13.38 -- 0.63, 4 200 Kainit__________ 200 Cotton seed 240 Acid meal). phosphate-} 352 32 172 152 5.31 2.01 1416 672 184 6. 7 8 1 200 Cotton seed meal) 560 404 200 Kainit j_____ No fertilizer-.- - - 144 __ _ 240 Acid phosphate 512 368 . ---200 Kainit 12.52 _ _ _ 12.25 10.66 1104 864 1048 960 280 200 128 1.76, .32 -3.26, 9 200 240 Cotton seed meal Acid S200 Kainit -____ 200 Cotton seed meal 10 240 Acid phosphatephosphate- 544 400 11 100 Kainit No fertilizer---. phosphate-- 464 320 8.27 872 56 -- 4.15. 144 .512 -_800------------ 12 240 100 Acid Kainit ---- 368 896 96 -3.27 100 Nitrate of soda * *200 pounds nitrate of soda per acre used on experiment at Hope Hull. LOWNDES COUNTY, 12 MILE SOUTHWEST OF LETOHATCHIE. J. B. MITCHELL, JR.-1914. Black prairie soil, with stiff gray subsoil. The land on which this experiment was conducted isa typical black prairie bottomland originally grew oak and trees. It had been in cultivation for many years. hickory which The three crops preceding the ferti- 167 lizer experiment were cottou. Au estimated damage of 15 to 20 per cent was done to all plots by boll weevils. The results of this experiment were very peculiar. It should be noted that all of the single fertilizers were profitable, but that little or no profit was secured from the application of these fertilizers in combination. increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot To acid phosphate plot _______----------To kainit plot __ ------------- - To acid phosphate and kainit plot -72 Average increase with cottonseed meal - 156 Increase of seed cotton per acre when acid phosphate added: To unfertilized plot --------712 -- -528 368 lbs 392 lbs. lbs lbs. lbs. was: lbs. To cottonseed meal plot To kainit plot - Average increase with acid phosphate - --Increase of seed cotton per acre when kainit was To unfertilized plot-------------------------To cottonseed meal plot To acid phosphate plot - -- To cottonseed meal and kainit plot ------------ -- added: lbs 672 -184 lbs. 472 lbs 152 lbs 24 lbs. 88 lbs lbs.. To cottonseed meal and acid phosphate plot Average increase with kainit---------------4 lbs 512 lbs MONTGOMERY COUNTY, 12 MILES SOUTH OF MONTGOMERY. 0. C. MOGEHEE--1914. Dark gray upland prairie soil. This experiment, through error, was made on plots which were slightly less than one-eighth ,acre each in size.' Fertilizers which were shipped to Mr. McGehee for the. test were for one-eighth acre and were applied to the plots which were under-size, making the per acre rate of application of fertilizers as follows: 216 pounds cottonseed meal 259 pounds acid phosphate 216 pounds kainit In the*calculations, allowances are made for the size of plots. This old prairie upland had been in cultivation many years.. Cotton had been the preceding crop for at least three years. The stand on all plots was fair to good. The largest increase, 443 pounds seed cotton peracre, was obtained from Plot at a profit of $4.370. 108, pounds nitrate of soda. 10, 168 This plot was fertilized per acre with 216 pounds cottonseed meal, 259 pounds acid phosphate and 216 pounds kainit. The average increase due to cottonseed meal was 72 pounds seed cotton per acre; to acid phosphate, 127 pounds; and to kainit 154 pounds seed cotton per acre. Cottonseed meal was better than nitrate of soda by 160 pounds seed cotton per acre. -Increase of seed cotton er acre when cottonseed meal added: 18 To unfertilized plot -To acid phosphate plot 72 -24 To kainit plot 223 To acid phosphate and kainit plot was lbs. lbs. lbs. lbs. increase To Average increase with cottonseed meal 72 lbs. of seed cotton per acre when acid phosphate was added: 65 lbs. To unfertilized plot ___________ To cottonseed To kainit plot -------- meal plot - ----- 119 lbs. 39 lbs. cottonseed meal and kainit plot plot 286 lbs. Average increase with acid phosphate int.rease of seed cotton per acre when kainit was To unfertilized To acid phosphate --- added: - - --- - - - -- 140 - 127 lbs. To cottonseed meal plot----------plot ------------ 114 98 lbs. lbs. lbs. To cottonseed meal and acid phosphate plot__ 265 lbs. Average increase with kainit ------154 lbs. Increase of seed cotton per acre from use of different quantities of kainit: To use of 216 pounds To use of 108 pounds kainit -------- kainit -------265 _ 306 lbs. lbs. Increase from use of cottonseed meal in complete fertilizer------------------- ---------------- 223 lbs. Increase from use of nitrate of soda- -- -- -- -- -- -- -- 117 lbs. 106 lbs. Cottonseed meal better than nitrate of soda by 169 Experiments in Montgomery County MONTGOMERY MONTGOMERY 1914 o 1915 KIND OF o a o0 N z "i FERTILIZER 4-;m~ Lbs. Lbs. $ Lbs. 216 Cotton seed 5o6 18 -2.60 613 65 0.25 259 Acid phosphate No fertilizer-548 _104 682 140 1.68 216 Kainit____s _ _ 216 Cotton seed meal 674 137-1.67 2,9 Acid phosphate-648 116 6 216 Cotton seed meal 216 Kainit_________ 7 i No fertilizer_ 52713 85 259 Acid phosphate 708 179 0.6 216 Kainit__________ 216 Cotton seed meal 259 Acid phosphate 216 Kainitsae 3 4 27 216 Cotton seed meal 443 4.37 j 976 10 259 Acid phosphate 108 Kainit____.. _ 11 No fertilizer _ 535259, Acid phosphate-872 337 2.03 12 108 Kainit---108, Nitrate of soda 1 2 3 4 meal-- Lbs. 181 Lbs. 77 $ 0.15 164 216 294 60 103 173 0.83 2.09 2.56 i 6j 354 205 3.34 9 3 371 11 201 9 2.47 181 397 216 3.13 - In to the one in 1914. The average increase 'due to cottonseed meal was 66 pounds seed cotton per acre; to acid phosphate, 74 pounds; and to kainit, 95 pounds seed cotton per acre. The largest profit, $3.34 per acre, was obtained on Plot 8, fertilized per acre as -1915, 0. C. MCGEHEE-1915. Mr. McGehee made an experiment similar follows: 259 pounds acid phosphate, 216 pounds kainit. 'The largest increase in seed cotton per acre was ohtamned on' Plot 12, fertilized as follows: 239 pounds acid phosphate 108 pounds kainit 108 pounds nitrate of soda. :170 Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot 77 lbs. To acid phosphate plot -------------------- 113 lbs. To kainit plot 69 lbs. Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot _-__To cottonseed meal plot --60 lbs. 96 lbs. -To acid phosphate and kainit plot Average increase with cottonseed meal _ - 6 lbs. 66 lbs. To kainit plot To cottonseed meal and kainit plot 102 lbs. 39 lbs. Average increase with acid phosphate 74 lbs. Increase of seed cotton per acre when kainit was added: To unfertilized plot -----------------------103 lbs. To acid phosphate plot -145 lbs. To cottonseed meal and acid phosphate plot 38 lbs. Average increase with kainit 95 lbs. Increase of seed cotton per acre from use of different quantities of kainit: To use of 216 pounds kainit fertilizer - To cottonseed meal plot - - - 95 lbs. _ _38 - lbs. To use of 108 pounds kainit __28 Increase from use of cottonseed meal in complete Increase from use of nitrate of soda Nitrate of soda better than cottonseed meal by lbs. 6 lbs. 21 lbs. 15 lbs. HALE COUNTY, 3 MILES EAST OF AKRON. J. R. HOLBROOK-1914. Light reddish, fine sandy soil, with stiffer red subsoil. This upland soil had been in cultivation for many years. Corn was the preceding crop, and it was preceded by two crops of cotton. The largest profit secured on this test was made on Plot 12, which produced an increase of 504 pounds seed cotton per acre, at a profit of $5.71, when 240 pounds acid phosphate, 100 pounds kainit and 100 pounds nitrate of soda were applied per acre. The next largest profit, $4.91 per acre, was made on Plot 5, receiving per acre 200 pounds cottonseed meal, and 240 pounds acid phosphate, although Plot 9, which received a complete fertilizer containing 200 pounds kainit made a slightly higher increase than did Plot 5. The average increase due to cottonseed meal was 319 pounds of seed cotton per acre; to kainit, 76 pounds; and to acid phosphate, 46 pounds of seed cotton per acre. Nitrate of soda applied June 17 was more effective than cottonseed meal by 108 pounds seed cotton per acre. 171 Increase of seed cotton per acre when cottonseed meal was added: 412 lbs. To acid phosphate plot 212 lbs. To kairit plot 356 lbs. To acid phosphate and kainit plot 319 lbs. Average increase with cottonseed meal Increase of seed cotton per acre when acid phosphate was added: lbs. To unfertilized plot_24 140 lbs. To cottonseed meal plot 62lbs. ----------To kainit plot 82 lbs. To cottonseed meat and kainit plot 46 lbs. Average increase with acid phosphate-Increase of seed cotton per acre when kainit was To unfertilized plot ------------ To unfertilized plot ---- 296 lbs. To cottonseed meal and acid phosphate plot Average increase with kainitIncrease of seed cotton per acre from use of ties of kainit: To cottonseed meal plot To acid phosphate plot ----- 76 lbs. different quanti¢ added: lbs. 154 12 lbs. - 68,lbs. 70 lbs - ,Increase To use of 200 pounds kainit To use of 100 pounds kainit from use of cottonseed meat_Increase from use of nitrate of soda --- --- -- - - -40 12 lbs lbs. - - 356 lbs. Nitrate of soda better than cottonseed meal by AKRON - 464 lbs. 108 lbs. Experiments in Hale ard Perry Counties MARION 1914 p 1914 ° 7 O N 0 Or0 KIND OF o a O 5a ° ). ON FERTILIZER W .- " 0- C)'W Lbs. 800 720 480 ° N S Q 1 2 3 Lbs 200 Cotton seed meal 240 Acid phosphate No fertilizer ---- Lbs. 824 552 528 - Lbs. $ 3.51 296 24 -1.15 _ -= 4 200 5 200 240 6 200 S 200 7 240 8 200 (200 Kainit Cotton seed mea Acid phosphate Cotton seed meal Kainit ----No fertilizer-- - Acid phosphate--' Kainit- ---Cotton seed mealL Acid phosphate- 680 960 888 520 616 976 154 436 366 --- 1.99 4.91 3.65 ---- 560 1040 880 8 -720 '1040 -3.60 ---240 -- Lbs. $ 4.04 320 80 1560 0.36 7.64 4.40 -4.18 6.68 400 ------ 92 1.06 3.78 -50 580 9~ -S 200 Kainit--S200 Cotton seed meal 240 Acid 1~100 Kainit --No fertilizer 240 Acid phosphate- 240 448, 396 t 10~ phosphate- 928, ---536 536 3.33 1040 590. 7.60 -- ii 00 12~ 100 Kainit_--_1100 Nitrate of soda 104 54 571 440.,-30 70 16 0 .170 30 16 172 PERRY COUNTY, 4 MILES SOUTH OF MARION. R. H. WOODFIN-1914. Reddish sandy loam, with stiffer reddish subsoil. This old land on which cotton had been grown for a long period had been cleared of the original forest trees 25 or more years. A good stand was secured on all plots. Boll weevils were present, but did only slight damage. This soil, which had not been highly fertilized in recent years, needed a complete fertilizer as shown by the fact that Plots 10 and 9 afforded the largest increase in yield, namely, 590 and 580 pounds of seed cotton per acre. However, a profit slightly larger than on the plots receiving complete fertilizer, $7.60 per acre, was obtained on Plot 5, fertilized with cottonseed meal and acid phosphate. The average increase in seed cotton per acre attributable to cotton seed meal was 398 pounds; to acid phosphate, 133 pounds; while with kainit there was an average decrease of 3 pounds. Cotton seed meal applied before planting was decidedly superior to nitrate of soda applied June 19. Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot 320 lbs. To acid phosphate plot 320 lbs. To kainit plot 320 lbs. To acid phosphate and kainit plot- -------. 630 lbs. Average increase with cottonseed meal 398 lbs. Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot ------------------------240 lbs. To cottonseed meal plot ------ 240 lbs. To kainit plot ----------------------------130 lbs. To cottonseed meal and kainit plot 180 lb-. Average increase with acid phosphate 133 lbs. Increase of seed cotton per acre when kainit was added: To unfertilized plot_---------80 lbs. To cottonseed meal plot -------------------80 lbs. To acid phosphate plot 190 lbs. To cottonseed meal and acid phosphate plot 20 lbs. Average increase with kainit-- -----------3 lbs. Increase of seed cotton per acre from use of different quantities of kainit: To use of 200 pounds kainit_-----20 lbs. To use of 100 pounds kainit ---------------30 lbs. Increase from use of cottonseed meal 630 lbs. Increase from use of nitrate of soda in complete fertilizer ---------------------------------- 360 lbs. Cottonseed meal better than nitrate of soda by 270 lbs. -------------- - 173 DALLAS COUNTY, 9 MILES SOUTH OF SELMA. W. J. TEMPLIN-1914. Gray sandy soil, with stiffer yellow subsoil. This experiment was made on upland soil which originally grew short-leaf pine. The land had been cleared a number of years and cropped to corn and cotton most of the recent years. The largest increase in seed cotton per acre was made on Plot 9, receiving 200 pounds cottonseed meal, 240 pounds acid phosphate and 200 pounds kainit per acre. However, the largest profit, $4.39 per acre, was made on Plot 1, which was fertilized with cottonseed meal alone at the rate of 200 pouns per acre. The average increase in seed cotton per acre due to the application of 200 pounds of cottonseed meal was 202 pounds; to 240 pounds acid phosphate, 91 pounds; and to 200 pounds kainit, 27 pounds seed cotton per acre. Two hundred pounds of kainit was more effective than was 100 pounds per acre when used in a complete fertilizer. Cottonseed meal was more effective than was nitrate of soda by 162 pounds seed cotton per acre. Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot -336 lbs. To acid phosphate plot 64 lbs. To kainit plot -------184 lbs. To acid phosphate and kainit plot 222 lbs. Average increase with cottonseed meal__ 202 lbs. Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot ---176 To cottonseed meal plot lbs. To kainit plot 122 lbs. To cottonseed meal and kainit plot- ---160 lbs. Average increase with acid phosphate 91 lbs. Increase of seed cotton per acre when kainit was added: To unfertilized plot ------------------------52 lbs. To cottonseed meal plot--------100 lbs. To acid phosphate plot -2 lbs. To cottonseed meal and acid phosphate plot__ 156 lbs. Average increase with kainit- __-------27 lbs. Increase of seed cotton per acre from use of different quanti. ties of kainit: 156 lbs. To use of 200 pounds kainit--- ------------122 lbs. To use of 100 pounds kainit ----------------Increase from use of cottonseed meal in complete -96 lbs. - fertilizer --------------- Increase from use of nitrate of soda Cottonseed meal better than nitrate of soda by -------------- 222 lbs. 60 lbs. 162 lbs. 174 Experiments in Dallas County SELMA 1914 j SELMA 1915 : 1 2 KIND OF 0 za FERTILIZER i ° Lbs. 200 Cotton seed meal 240 Acid phosphate No fertilizer-___--_ Lbs. 1344 1184 1008--- 4 1 .I 3 200 200 240 200 200 240 S 200 200 240 S 200 200 240 9) 10 1 _-____--___ Cotton seed meals Acid phosphate-0 Cotton seed meal ! Kainit7No fertilizer-_--___' Acid phosphate- - _ Kainit -_--Cotton seed meal Acid phosphateKainit ----_ Cotton seed meal Kainit 1120 1368 1424 4 Lbs. $ . Lbs. 336 4.39 896 176 2.19 696 592 52 -0.26 240 52 Lbs. 344 144 68 $ 12.14 4.66 0.73 --- 36 23 47 0.75 440 584 744 2 1248 1384 1568 1496 174 132 280 1.87 5.38 3962.63 362 -488 ( 1 No. fertilizer_ 096 240 IAcid phosphate00I 26 100 Kainit 2h12 1296 100 Nitrate of soda 100 Acid phosphate-Kainit 2.58 824 348 9.50 0 200 0.8 640 152 0.88 TEMPLIN-1915. In 1915, this experiment was conducted on a similar W. J. soil but different acre, was received from Plot 1, fertilized with 200 pounds cottonseed meal per acre. plots. Tile largest profit, $12.14 per crease, 360 pounds seed cotton per acre, was obtained where 200 pounds cottonseed meal and 240 pounds acid phosphate were used on Plot 5. This plot produced the second largest profit. As in 1914, cottonseed meal appeared to be the most important single fertilizer needed on this soil. The average increase due to cottonseed meal when applied at the rate of 200 pounds per acre was 217 pounds seed cotton per acre; to 240 pounds acid phosphate, 69 pounds seed cotton per acre; while with kainit there was an average loss of 35. pounds seed cotton per acre. The largest in- 175 Cottonseed meal when applied in a complete fertilizer produced 196 pounds more seed cotton per acre than did nitrate of soda also applied in a complete fertilizer. Increase of seed cotton per acre when cottonseed meal was added: 344 lbs. To unfertilized plot----216 lbs. To acid phosphate plot To kainit plot _--- 160 lbs. To acid phosphate and kainit plot Average increase with cottonseed meal 148 lbs. 217 lbs. Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot _ To kainit plot-- ---- 144 lbs. To cottonseed meal plot ----To cottonseed meal and kainit plot Average increase with acid phosphate To unfertilized plot To cottonseed meal plot 16 lbs. 64 lbs. 52 lbs. 69 lbs. 68 lbs. lbs. -116 Increase of seed cotton per acre when kainit was added: ---- To acid phosphate plot To cottonseed meal and acid phosphate plot Average increase with kainit -12 -80 lbs. lbs. 35 lbs. AUTAUGA COUNTY, 21/2 MILES WEST OF AUTAUGAVILLE. WV. G. PICKETT-1914. Reddish sandy soil, with stiffer red sandy subsoil. This land had been long in cultivation. The three preceding crops were cotton. The stand was good on all plots. No damage by disease or insect pests was reported. The largest increase, 260 pounds of seed cotton, was obtained on Plot 5, fertilized per acre as follows: 200 pounds cottonseed meal 240 pounds acid phosphate. The average increase due to cotton seed meal was 189 pounds of seed cotton per acre; to acid phosphate, 22 pounds; while with kainit there was an average loss of 68 pounds of seed cotton per acre. Nitrate of soda applied after growth had begun seemed more effective than did cotton seed meal applied before planting. 176 Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot--------------------------240 lbs. To acid phosphate plot _-______-140 lbs. To kainit plot 140 lbs.236 lbs. To acid phosphate and kainit plot______ Average increase with cottonseed meal 189 lbs. Increase of seed cotton per acre when acid phosphate was added: lbs. To unfertilized plot-120 20 lbs. To, cottonseed meal plot lbs. To kainit plot __-----------74 -_-_ To cottonseed meal and kainit plot_ Average increase with acid phosphate Increase of seed cotton per acre when kainit was --- To unfertilized plot-30 To cottonseed meal plot To acid phosphate plot _________164lbs. added: lbs.. -70 lbs. 22 lbs. 22 lbs. To cottonseed meal and acid phosphate plot,--_-68 lbs. Average increase with kainit 68 lbs. Increase from use of cottonseed meal in complete fertilizer-- Increase from use of nitrate of soda-Nitrate of soda better than cottonseed meal by Experiments in Autcauga County AUTAJGAVILLE 236 lbs. 288 lbs. 52 lbs. 19141914 o0 0 PRATTVILLE 0 N O 0 z . d KIND OF FERTILIZER _ __ ___ a Y -__ O S __ __ __ __ ___ 1 2 3 Lbs. 200 240 No fetlzr Cotton seed meal Acid phosphate--- 40 Lbs. 720 600 Lbs. $ 3.28 240 120 0.96 500 Lbs. 675 500 Lbs. $ 0.85 175 00 -1.68 3 200 200 5 240 6 200 Kainit ofriie---Cotton seed meal Acid phosphateCotton seed mealW No fertilizerAcid 560 4 8 84 800 - 30 26 170 -44 -0.74 1.4 0.66 -4.05 540 40 769 485 716 44 -0.43 38 281 _- .9 1.78, 8 7 240 ____ S 200 Kainit_ 200 Cotton seed meal 240 Acid phosphate- 680_ 640 ---2.02 232 9 10 112 200 Kainit____ __ _ 200 Cotton seed meal 240. Acid phosphate 100 0 Kainit-- phosphate- 80 80 12-.6 12 1.690 90 47 47 39 37 No aii fertilizer Nitrate of -----. --_ _ ___ 760 696 1 68 -3.88 __- 20 _____ .4 - 864 382 3.02 4- 480---------e 2 40 100 soda-1-2 27 90 40 43 177 AUTAUGA COUNTY, 6 MILES SOUTH OF PRATTVILLE. W. A. WADswoR - 1914. Gray flue sandy loam, with brownish red very fine sandy subsoil. This lowland field had been in cultivation for years. The three preceding crops were cotton.-The stand was good. In 1914 this soil needed a complete shown by the largest increases and largest profits being made on Plots 12, 9 and 10. Nitrogen was first in importance, affording an' average increase, in all combinations, of 246 pounds of seed cotton per acre; the increase attributable to acid phosphate was 134 pounds per acre; and to kainit, 123 pounds. (See page 176.) Nitrate of soda afforded a larger yield than did cotton seed meal by 58 pounds seed cotton per acre. many fertilizeras increase of seed cotton per acre when cottonseed meal was To unfertilized plot 175 To acid phosphate plot 348 To kainit plot --- ----237 To acid phosphate and kainit plot 225 Average increase with cottonseed meal 246 increase, seed cotton per acre when acid phosphate added: To unfertilized plot - - - - - - - - - - - -0 To cottonseed meal plot--------------------- 173 added: lbs. lbs. lbs. of lbs. lbs. was lbs. lbs. lbs. To kainit plot -------------------- To cottonseed meal and kainit plot------------ 176 lbs. Average increase with acid phosphate 188 lbs., - ---134 Increase of see~d cotton per acre when kainit. was added : To unfertilized plot-------------------------To cottonseed meal plot---------------------To acid phosphate plot---------------------- To cottonseed meal and acid phosphate plot -_ 109 lbs. Average increase with kainit -- -- -- -- -- ---- 123 lbs. -Increase of seed cotton ties 44 lbs. 106 lbs.. 232 lbs. To use of 200 pounds kainit ---------------To use of 100 pounds kainit-----------------Increase from use meal in of kainit: Per acre from use of different quanti- Increase from use of nitrate of soda -- -- 34 lbs. of cottonseed fertilizer---------------------------------225 lbs. Nitrate of soda better than cottonseed meal by 109 lbs. -- complete -- -- -- -- 283 lbs. _ 58 lbs.. 178 ELMORE COUNTY, 1 MILE EAST OF ECLECTIC. H. D. TEMPLETON 1914. Gray sandy loam, with yellow stiffer subsoil. The land on which this experiment was conducted had been cleared of its original forest growth for about seven years. The preceding crop was corn, which was preceded by two crops of cotton. There was no rust, wilt, or insect damages reported. The largest increase, 296 pounds seed cotton per acre, was produced on Plot 5, at a profit of $1.83 per acre. This plot was fertilized with 200 pounds cottonseed meal and 240 pounds acid phosphate. Plot 6, receiving 200 pounds cottonseed meal and 200 pounds kainit produced the second largest increase, which was 244 pounds of seed cotton per acre. For some unaccountable reason this experiment, in 1914, did not produce favorable increases on Plots 8, 9 and 10, as compared with Plots 5 and 6. The average increase due to cottonseed meal was 102 pounds seed cotton per acre; to acid phosphate, 96 pounds; and to kainit, 84 pounds of seed cotton per acre. Nitrate of soda, at the rate of 100 pounds per acre, when applied when the plants were about 6 inches high, was less effective by 88 pounds of seed cotton per acre, than was cottonseed meal when applied in a complete fertilizer before planting. H. D. TEMPLETON-1915 A regular cotton fertilizer experiment like the one in 1914, was made by Mr. Templeton on these same plots in 1915. All plots were damaged by dry weather after August 15. The largest increase in seed cotton per acre, pounds, produced at a profit of $12.14 per acre, was secured on Plot 10, where an application of the following fertilizers was used: 200 pounds cottonseed meal per acre 240 pounds ,acid phosphate per acre 100 pounds kainit per acre. The second largest increase, 384 pounds seed cotton per acre, and the second largest profit, $9.96 per acre, were obtained from Plot 9, fertilized with a complete fertilizer like on Plot 10, except that it contained 200 pounds of kainit instead of 100 pounds. Nitrogen, phosphate, and potash with one exception, 108 179 gave an increased yield in seed cotton per acre, with an average increase of 170 pounds seed cotton per acre due to cottonseed meal; of 86 pounds, attributable to acid phosphate and 96 pounds, in consequence of the application of 200 pounds kainit. Cottonseed meal, in 1914, applied before planting, was more effective by 136 pounds seed cotton per acre than was nitrate of soda applied about May 15. J. M. TEMPLETON 1916. The same experiment which was conducted by H. D. Templeton in 1914 and again in 1915 was conducted by J. M. Templeton in 1916. Fifty pounds of muriate of potash per acre was used as a source of potash on this test instead of 200 pounds of kainit. It is to be remembered that 1916 was a most unfavorable year for the production of cotton in central Alabama, due to excessive rains in July and the heavy infestation of boll weevils which followed. These injuries may have been the cause of the low yields on the plots of this test; although Mr. Templeton did not report this as being the case. The largest profit, $4.26 per acre, and the largest increase, 128 pounds seed cotton per acre, were obtained on Plot 5, fertilized per acre as follows: 200 pounds cottonseed meal 240 pounds acid phosphate. The only other plot in the experiment producing a profit was Plot 2, on which 240 pounds of acid phosphate alone was used. The profit and increase on this plot being $4.06, and 80 pounds seed cotton per acre. In this unfavorable year the average increase due to the application of 200 pounds cottonseed meal was only 19 pounds seed cotton per acre; to acid phosphate at the rate of 240 pounds per acre, 93 pounds; while with kainit there was an average loss of 19 pounds seed cotton per acre. Cottonseed meal, applied before planting, was more effective and produced an increase of 68 pounds more seed cotton per acre than did nitrate of soda, applied when the plants were about six inches high. It is to be noticed that in this year of heavy infestation of boll weevil after about the first week of July, that acid phosphate, which hastened maturity, was of prime importance. 180 H. D. TEMPLETON AND J. M. TEMPLETON (Average all years.) The average of the results of these three experiments seem to indicate a need of nitrogen and phosphate, and probably potash on this soil. However, the unfavorable conditions which entered make the results somewhat questionable. The highest average increase for the three years was 227 pounds seed cotton per acre, obtained where cottonseed meal and acid phosphate were used on Plot 5. However, this average increase is closely followed by the average increase on Plots 10 and 9, fertilized with a complete fertilizer containing 100 and 200 pounds kainit each, respectively. On the average, potash in a complete fertilizer was not profitable, but this is probably due to unusually dry weather after August 15, 1914, and to unusually wet weather after July 15, 1916. Good results were obtained from potash during the season of 1915. Nitrate of soda, on the average, was not as profitable as cottonseed meal. Experiments ECLECTIC in ElmoreCounty ECLECTIC ECLECTIC'ECLECTIC 1914 o ° 1915 ° 1916 o Average All Years 6 KIND OF g o yN"; _ __ __ _ __ oa5 oaNO o N aQ, b a FERTILIZER Q) aa C) 4-J __4__ cn _ _ -4-1a __ _ _ _ __ a _ a., _ _ __ __ 1 2 3 4 Lbs. 200 240 200 200 240 200 200 240 200 200 240 200 200 240 Cotton seed meal Acid phosphate-- - No fertilizer -- Lbs. 832 944 928 1200 1136 880 976 976 928 784 992 Lbs. -96 16 44 -5.11 -1.33 S43 1.83 0.97 -0.44 -2.91 0.80 -2.74 7 Kainit Cotton seed meal Acid phosphateCotton seed meal l Kainit_ _ _ _ _ No fertilizer---phosphate- 296 244 Lbs. 752 608 592 736 880 800 656 768 992 992 560 832 Lbs. 160 16 128 256 160 136 384 408 4.04 -0.98 3.37 6.58 1.78 2.04 9.96 12.14 Lbs. 128 208 128 96 240 112 96 176 176 208 112 Lbs. 0 80 24 128 8 76 72 100 -3.50 4.06 -15.85 4.26 16.88 -10.25 14.06 -4.90 Lbs. 571 587 549 597 773 683 544 640 715 709 485 Lbs. $ 21 -1.52 37 0.58 49 227 137 111 200 209 4.30 4.22 -4.71 -2.88 -2.34 1 .50 Acid 10 100 240 Kainit_ _ _ _ _ CJotton seed meal Acid phosphate_ ____-Kainit Cotton seed meal Acid phosphate) Kainit __ ___ No fertilizer---_ Acid ant. 120 144 208 120 21 *50 100 100 Nitrate of soda phosphate 272 6..16 144 32 -10.39 656 171 1-1.68 pounds muriate of potash used instead of 200 pounds kainit as source of potash in 1916. 182 Increase of seed cotton per acre when, cottonseed meal was added: To unfertilized plot -- To acid phosphate plot To kainit plot ----To acid phosphate and kainit plot Average increase with cottonseed meal-102 - 1914 - 96 280 200 24 1915 160 240 32 248 170 1916 Av. 0 48 32 -4 189 88 8g 97 19 Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot---------- ---- 16 To cottonseed meal plot------ -392 To kainit plot-------------------76 To cottonseed meal and kainit plot --100 Average increase with acid phosphate --96 16 96 8 224 86 128 128 100 64 93 37 205 63 92 61 Increase of seed cotton per acre when kainit was To unfertilized plot-------------To cottonseed meal plot--------- added: 44 340 To acid phosphate plot--_- - To cottonseed meal and acid phosphate. plot --- -- - - --- -Average increase with kainit. meal in complete 104 152 84 24 0 120 128 94 -24 -4 -19 -4 8 116 49, - -36 Increase from use of cottonseed Increase from use of nitrate of soda - - - - - - -- - - - - - 112 Cottonseed meal better than ni- -27 53, 89 51 fertilizer--- 248 112 -72 *50 pounds trate of soda by------88 136 39 pounds muriate .of potash per acre used instead of 200, '68 MACON kainit in 1916. COUNTY, 2 MILES EAST OF TUSKEGEE. W. C. HARDWICK 1914. Light colored sandy loam, with stiffer red subsoil. The three preceding crops were cotton. A good stand was obtained on all plots. The largest increase, 360 pounds of seed cotton per acre, and the largest profit, $2.54 per acre, were obtained on Plot 12, fertilized as 240 pounds acid phosphate follows: per acre 100 pounds -kainit per acre 100 pounds nitrate of soda per acre. The average increase due to cotton seed meal was. 140 pounds seed cotton per acre; to acid phosphate,. 77 pounds; and to kainit, 61 pounds. Nitrate of soda was more effective than cottonseed meal by 112 pounds seed cotton per acre. 183 Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot ---------- To acid phosphate plot-----------------------196lbs.To kainit plot'-124 lbs. To acid phosphate and kainit plot----------- -- 144 lbs. Average increase with cottonseed meal 96lbs. - - - - 140 lbs. Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot To cottonseed meal plot - -- To kainit plot ------To cottonseed meal and kainit plot Average increase with acid phosphate Increase of see~d cotton per acre when kainit was To unfertilized plot ---To cottonseed meal plot ----------To acid phosphate plot Average ties -40 lbs. 66 lbs. 77 lbs. 130 lbs. 150 lbs. added: lbs. -18 - - To cottonseed meal and acid phosphate plot: increase with kainit -- ----------- 10 lbs.. 61 lbs.. ------ ---- 152 lbs.. 100 lbs.. Increase of seed cotton per acre from of kainit: use of different quanti100 lbs.. To use of 200 pounds kainit ------ To use of 100 pounds kainit -------Increase from use of cottonseed meal in complete fertilizer - - - - - - - - - - - - - - - - - Increase from use of nitrate of soda - - - ----------Nitrate of soda better than cottonseed meal by 92 lbs. 144 lbs.256 lbs. 11-2 lbs. 184 Experiments in Macon County Tf 1 TUSKEGEE 1914 1 a O 0e NOTASULGA 1914 I KIND OF FERTILIZER o O 0 z d 0N Cd 4 O o 4- . 4-d s, U 4S 5 6" t 7 1 2 3. 16 I200 8 9 Lbs. Lbs. 200 Cotton seed meal 776 240 Acid phosphate _640 No fertilizer-_ 680200 Kainit____ 688 200 Cotton seed meal J 888 240 Acid phosphate_20Cto edma 864 2.00 Kainit__ No fertilizer--784240 4 Xi phosphate--)92 bsbt 928 200 Kainit -______ 200 Cotton seed meal 240 Acid pbosphate_ _11 200 Kainit04 200 Cotton seed meal ICotton seed meal) 6 Acid Lbs. $ 96-0.89 -40-2.56 -18 1.80 Lbs. 1008 864 672 928 Lbs. $ 336 4.39 192 2.54 212 3.26 156-1.25 106 0 1056 1056 848 296 252 172 1.83 1.14 0.70 -2.07 -0.621 ~ 112 5 976 04 92 1 . 11 12 100 Kainit __0______No fertilizer___-_ 240 Acid phosphate 100 Kainit---------Nitrate of soda 912 1272 360 -- - 672 960 288 0.96 2.54 SI 100 J MACON COUNTY, 1/2 MILE SOUTHWEST OF NOTASULGA. W. J. BRIDGES 1914. Light colored sandy loam, with stiff er subsoil years in cotton. The stand on all plots was good. this dry year cottonseed meal alone gave the largest increase in yield, 336 pounds seed cotton per acre, and the largest profit, $4.39. [he average increase due to cottonseed meal was tion. iT uplandl field ihad been his Tile preceding manyfl cultivaby crops were corn, preceded In -115 pounds seed cotton per acre; while on the average, with both phosphate and potash, comparatively no increase or decrease was obtained. Nitrate, of soda applied June 10, was more effective by 28 pounds seed cotton per acre than was cottonseed meal applied before planting. 185 Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot--------------------------336 lbs. To acid phosphate plot To kainit plot -- ------------ 104 lbs. lbs. lbs. 40 lbs. To acid phosphate and kainit plot-20 Average increase with cottonseed meai-------115 Increase of seed cotton per acre when acid phosphate added: To unfertilized plot------------------------192 To cottonseed meal plot----------------------40 To kainit plot ------40 To cottonseed meal and kainit plot -100 Average increase with acid phosphate -- was lbs. lbs. ---_ 1b5-. lbs. Increase of seed cotton per acre when kainit was To unfertilized plot ---------- added: - 3 lbs. 212 lbs. lbs. lbs. lbs. To cottonseed meal plot ______ - To acid phosphate plot To cottonseed meal and acid phosphate plot Average increase with kainit - - Increase of seed cotton per ties of kainit: acre from -_- use of -- different quanti-_ 84lbs. -20 --144 9 144 lbs 36 lbs. To use of 200 pounds kainit To use of 100 pounds kainit ___ MONROE COUNTY, 3 MILES WEST OF MONROEVILLE. J. R. CARTER 1912. Gray sandy loam, with stiffer red subsoil. For the results of this experiment see table on page 32 of the Alabama Experiment Station Bulletin No. 169. J. R. CARTER 1914. In 1914, Mr. Carter conducted an experiment on the same plots as in 1912. The largest increase, ,322 pounds seed cotton per acre, was secured on Plot 10, fertilized per acre as follows : 200 pounds cottonseed meal 240 pounds acid phosphate 100 pounds kainit. The largest profit, $2.72 per acre, was made on Plot 2, fertilized with acid phosphate alone at the rate of 240 pounds per acre. The average, increase. attributable to cottonseed meal was 96 pounds seed cotton per acre; to acid phosphate, 183 pounds; while' with kainit there was an averiage 186 loss of 6 pounds seed cotton per acre. However, kainit when applied in a complete fertilizer at the rate of 100 and 200 pounds per acre produced increases of 154 and 116 pounds seed cotton per acre, respectively. Nitrate of soda and cottonseed meal were about equally effective on this soil in 1914. J. R. CARTER -1915. An experiment with cotton in 1915, on the same plots as the experiments in 1914 and in 1912, was conducted by Mr. Carter. Boll weevils were present and did much damage. The low yield per acre was probably due to the injury which they did. The increase in seed cotton per acre of 176 pounds where 200 pounds cottonseed meal, 240 pounds acid phosphate and 200 pounds kainit per acre were applied on Plot 9, is the largest in the experiment. This, however, is closely followed by Plot 10, fertilized with 200 pounds cottonseed meal 240 pounds acid phosphate 100 pounds kainit The increase on Plot 10 was 170 pounds seed cotton per acre, produced at a profit of $1.67. In this rather unfavorable year, the average increase attributable to cottonseed meal was 88 pounds seed cotton per acre; to acid phosphate, 37 pounds; and to kainit, 43 pounds seed cotton per acre. Kainit at the rate of 100 pounds per acre when applied in a complete fertilizer was practically as effective as 200 pounds. Cottonseed meal gave an increase of 34 pounds seed cotton per acre more than did nitrate of soda. J. R. CARTER, (Average all years.) An average of the three experiments conducted by Mr. Carter on this gray sandy loam, with rather stiff red subsoil shows that a complete fertilizer is needed. Plots 9, 10 and 12 all received a complete fertilizer and gave increases of 353 pounds, 343 pounds and 312 pounds of seed cotton per acre, respectively. It appears, however, that 100 pounds of kainit is practically as effective on this soil as 200 pounds, and that cottonseed meal was slightly more effective than nitrate of soda when both were applied on plots having an application of 240 pounds acid phosphate and 100 pounds kainit. Experiments in Monroc County -; MON ROEVILLE MON ROEVILLE MON ROEVILLE MON ROEVILI 1912 i 1914 ii. 1915 O) Average All Y'ears O 0 r r, O 0 - 0 O V 00 C z C C. KIND OF FERTILIZER V 0 - 0-0 C) N s- O OC dC) cC r .. N -C C)U ++ C.4-1 O 4Lbs. 675 632 495 501 675 6o1 472 613 811 793 443 Lbs $ 176 133 9189 183 149 353 343 34.930 .03 2.21 CD~ 10 11. 12 Lbs. Lbs. 736 200 Cotton seed meal 504 phosphate____ 240 344 No fertilizer-_ 200. Kainit_ _ -_ _ _ 432 200 Cotton seed, meal 616 240- Acid-phosphate-S 200 Cotton seed meal 640 200 Kainit --- -304 No fertilizer---240. Acid phosphate552 200 200- Cotton seed meal 888 240 Acid phosphate 200 Kainit___ 200. Cotton seed mealL 816 240- Acid phosphate100 Kainit-__ __ _ _ 272 No fertilizer---- Acid - Lbs. 392 160 98 292 326 256 600 536 12.68 4.72 2.52 7.00 8.64 7.16 17.'92 16.06 Lbs. 1000 1160 960 840 1096 1008 896 992 1152 1176. 840 Lbs. 40 200 -104 168 96 110 284 322 -2.12 2.72 -3.69 -0.98 -2.29 -0-.66 0.17 Lbs. 288 232 192 232 312 336 216 296 392 Lbs. $ 96 1.22 40 0.08 34 108 126 80 176 170 -0.76 0.07 0.28 -0.42 0.80 1.67 00c ~ .' .C :: +'O 06.481 2.51 Q1Ci 1 .70 386 216 240. l0oIKainit_ 100 Nitrate. of soda I I Acid phosphate_ 760 488 14.64. 1152 i 312 1.48 i 352 136 0.17 i 755 I 312 I 188 Increasein seed cotton per acre due to cottonseed meal, to soda. acid phosphate, to kainit, and to nitrate increase of seed cotton per acre when cottonseed meal was added: 392 To unfertilized plot-132 To acid phosphate plot To kainit plot_______________-- 228 To acid phosphate and kainit plot 344 Average increase with cottonseed -274 meal-------------Increase of seed cotton per acre acid phosphate was when added: To unfertilized plot--------------160 -100 To cottonseed meal plot 158 To kainit plot_____________- To cottonseed meal and kainit plot 274 Average increase with acid phos123 phate Increase of seed cotton per acre when kainit was added: 98 To unfertilized plot_____________ -66 To cottonseed meal plot To acid phosphate plot ---- 1912 1914 40 of 1915 96 68 Av. 176 56 -32 200 174 96 92 96 88 173 205 153 200 128 40 12 133 13 214 188 183 -104 46 50 37 34 30 139 171 114 9 7 96 To cottonseed meal and acid phos- -90 56 40 15 phate plot_____________- -__-- 308 109 Average increase with kainit Increase of seed cotton per acre from use of different quantities of kainit: 308 To use of 200 pounds kainitL----To use of 100 pounds kainit-------244 Increase meal in 116 -6 68 43 164 49 116 68 164 154 174 62 96 153 205 from use complete of cottonseed Increase from use of nitrate of soda Cottonseed meal better than ni- fertilizer--- 344 296 164 62 174 trate of soda by----------------48 10 34 31 MONROE COUNTY, 5 MILES SOUTHWEST OF MONROEVILLE. J. L. HOLLOWAY-1914. Gray sandy loam, with stiffer reddish subsoil. This land had been in cultivation for many years. The preceding crop was cotton. A fair stand was obtained on all plots. Some damage was done by boll weevils. This experiment although damaged by boll weevils and dry weather agrees in the main with one conducted in the same field the preceding year in that both show nitrogen to be the element chiefly needed, 189 phosphate as of relatively little value under these conditions, and 200 pounds of kainit as apparently reducing the yield. This last result may possibly have been due to the effect of this amount of kainit in delaying maturity, which is disadvantageous under conditions of boll weevil infestation. Cottonseed meal applied before planting was much more effective than nitrate of soda applied very late July 6. Increase of seed cotton per acre when cottonseed meal added: To unfertilized plot__________264 156 To acid phosphate plot 116 To kainit plot __-24 To acid phosphate and kainit plot-----------Average increase with cottonseed meal 140 Increase of seed cotton per acre when acid phosphate added: To unfertilized plot 104 To cottonseed meal plot ---------------------4 To kainit plot -----------------------------10 To cottonseed meal and kainit plot- ---- 82 Average increase with acid phosphate was lbs. lbs. lbs. lbs. lbs. was lbs. lbs. lbs. lbs. -- 7 lbs. Increase of seed cotton per acre when kainit was added: To unfertilized plot- ____-------_ -----_-158 To cottonseed meal plot- _ To acid phosphate plot _-104 To cottonseed meal and acid phosphate plot - 236 127 Average increase with kainit -10 lbs. --------------- lbs. lbs. lbs. lbs. 190 E xpeimirents in Monroe and 1914 0 O ( ; O Clarke THOMASVILLE MON ROEVILLE 1918 0 0 3 1 2 KIKND OF 0 0 o a 0, 0 FERTILIZER Lbs. No fetlie 200 Cotton seed meal 240 Acid phosphate Lbs. 376 640 - 480 360 8 624 352 464 Lbs. 264 104 -10 0 260 06 0 24 $ 2.81 0.61 -1.62 Lbs. Lbs. $ 288~ 408 120 7.70 304 16 -0.76 536 8 247 556 266 29237 572 231 19.91 21.24 18.15 4 Kainit__---Nofrtlzr-_-200---_ )2 240 [Acid phosphate__ 1 200 Cotton seed meal 7 No fertilizer 200 Cotton seed meal 1.04 2.07 -3.08 200 Kainit ----- 9 11 240 feAcid ie----35 ~352 2410 Kainit-__ __ 200 Cotton seed meal 240 Acid phosphate__ 376 200 Kainit seed mal ) 200 22--_phosphate 11.89 504 608 286 16.18 197, -5.55 t 100 Acid phosphate 241140 Cotton s60 f 24;0 100 Kainit ----No fertilizer---_ Acid phosphate _ KainitNitrate of - 36 352 360, 20e080 -. 20 8 60 60 352 32a2.8 33 2.8 "120 100 --soda-- ----8 -5.20 _ 32.85 752 400 source of potash in 1918. pounds .alkali salts used instead of .200 pounds kainit as QCLARKE COUNTY, 6 MILES WEST OF THOMAS VILLE. R. L. HEARRON 1918. Gray sandy loani, vith yellow stiffer subsoil. The land on which this experiment was conducted had been in cultivation many years. Two fertilizer experiments with corn had preceded the cotton fertiizer experiment. The stand on all plots was rather poor but uniform. -The average increase in seed cotton per acre due to cottonseed meal was 123 pounds; to acid phosphate, 29 pounds; while with kainit there was an average increase of 152 pounds seed cotton per acre. The largest 191 profit, $23.88 per acre, was obtained on Plot 10, fertilized per acre as follows: 200 pounds cottonseed meal 240 pounds acid phosphate 60 pounds alkali salts (equivalent to 100 pounds kainit). This plot also made the largest increase in seed cot- ton per acre, 323 pounds. Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot To kainit plot -- To acid phosphate plot -_____34 ------ -- 120 lbs. 250 lbs. lbs. To acid phosphate and kainit plot 89 Average increase w-ith cottonseed meal 123 Increase of seed cotton per acre when acid phosphate added: To unfertilized plot -16 To cottonseed meal plot 146 To kainit plot - -50 To cottonseed meal and kainit plot 5 Average increase with acid phosphate 29 Increase of seed cotton per acre when kainit was added: To unfertilized plot ------------ lbs. lbs. was lbs. 11s. lbs. lbs. lbs. 247 lbs. 161 lbs. To acid phosphate plot 181 lbs. To cottonseed meal and acid phosphate plot 20 lbs. Average increase with kainit 152 lbs. Increase of seed cotton per acre from use of different quantities of kainit: To use of 200 pounds kainit -20 lbs. To use of 100 nounds kainit 57 lbs. Increase from use of cottonseed meal in complete To cottonseed meal plot fertilizer -- 89 lbs. Increase from use of nitrate of soda Nitrate of soda better than cottonseed meal by -- 166 lbs. 77 lbs. CLARKE COUNTY, 3 MILES SOUTHWEST OF GROVE HILL. J. WINTERS CALHOUN--1913. Gray sandy soil, with stiffer red subsoil.. The land on which this experiment was conducted had been in cultivation about ten years. The crop planted previous to, the experiment was cotton. The stand on all plots was good. Boll weevils were present but did very little damage. (For a discussion of the results and tables see Alabama Experiment Station Bulletin No. 174 page 168-170. Also see table on page 194 of this bulletin.) 192 J. WINTERS CALHOUN-1914. In 1914, an experiment was repeated on the same plots as in 1913. The seasons were very favorable and the test was well conducted. The largest increase in seed cotton per acre, 544 pounds, was received from Plot 9, fertilized with 200 pounds cottonseed meal per acre 240 pounds acid phosphate per acre 200 pounds kainit per acre. The next largest increase, 520 pounds of seed cotton per acre, and a profit of $6.06 per acre, was made on Plot 10, which received the same amounts of cottonseed meal and acid phosphate as Plot 9, but only onehalf as much kainit. The average increase attributable to 200 pounds of cottonseed meal per acre was 210 pounds of seed cotton; to 240 pounds acid phosphate, 200 pounds seed cotton; and to 200 pounds of kainit, 28 pounds seed cotton per acre. Nitrate of soda, applied when the plants were about six inches tall, was not as effective by 152 pounds of seed cotton per acre as cottonseed meal, applied before planting. J. WINTERS CALHOUN-1915. The above experiment was continued in 1915, the same plots as in 1913 and 1914 being used. The stand was fair but uniform. Boll weevils are reported to have damaged the plots between 30 and 50 per cent. The largest profit, $5.45 per acre, and the largest increase in seed cotton per acre, 256 pounds, were made on Plot 10, fertilized per acre as follows: 200 pounds cottonseed meal 240 pounds acid phosphate 100 pounds kainit. The average increase due to cottonseed meal was 72 pounds of seed cotton per acre; to acid phosphate, 84 pounds seed cotton per acre; and to kainit, 20 pounds seed cotton per acre. Cottonseed meal was more effective than nitrate of soda by 112 pounds seed cotton per acre. J. WINTERS CALHOUN, (Average all years.) The average of three year's experimental work by Mr. Calhoun (See table on page 194) shows that the most important fertilizer for this particular soil in 193 these three years was the mixture used on Plot 10 which was composed of 200 pounds cottonseed meal per acre 240 pounds acid phosphate per acre 100 pounds kainit per acre. The average profit due to this mixture was $6.85 per acre, and the average increase per acre was 368 pounds seed cotton. On the average, cottonseed meal when used alone and acid phosphate when used alone gave good profits, although the average increases due to these single fertilizers were not as great by more than 80 pounds per acre as was the increase of 340 pounds seed cotton per acre obtained by the use of a complete fertilizer on Plot 9, composed of 200 pounds cottonseed meal 240 pounds acid phosphate 200 pounds kainit. The average increase for the three years due to cottonseed meal was 133 pounds seed cotton per acre; to acid phosphate, 140 pounds; and to kainit, only 15 pounds seed cotton per acre. One hundred pounds kainit per acre when used in a complete fertilizer was more effective and more profitable than was 200 pounds. Nitrate of soda and cottonseed meal, on the average, were of equal importance. Experiments in Clarke County GROVE G 0 0' V) ______ HILL 1913 r- ~u -1. u 0 GROVE HILL 1914 O O C). GROVE HILL 1915 g/rl 0 0 0 U Co 14- GROVE HILL Average All Years 0 ~0 C) C ) o 0 0 C) C)C rd 6 ° 4 c KIND OF FERTILIZER O a) (3.) O -e NI CC) .2 i .-. C Cf) C) 4- 0) C) C.C. C) 'CC + O00 cct a) 0 C) V I) C) I C) 4. O. C -I t I C.)-1 34 7 1 2 5 6 Lbs. 200 Cotton seed meal 240 Acid phosphate No fertilizer---- { 8 200 Kainit 200 Cotton seed meal 240 Acid phosphate 6 20'Cottod seed meal Lbs. 832 784 576 592 816 736 592 848 928 992 Lbs. 256 208 12 232 148 232 288 328 8.26 7.47 -0.87 5.53 2.11 7.13 Lbs. 1072 928 656 736 1040 944 768 1104 1328 Lbs. 416 272 52 328 204 328 544 520 Lbs. 6.15 4.30 0.26 2.54 0.09 4.14 5.89 6.06 336 352 224 256 352 304 192 304 400 448 192 Lbs. 119 128 40 144 104 112 208 256 1.93 3.95 -0.50 1.66 -0.68 0.99 2.21 5.45 Lbs. 747 688 485. Lbs. $ 261 5.45 203 _ _ 528 661 517 752 ---0.54 5.24 3.24 0.51 35 736 235 152 224 347 0 Kainit:___-_ Cotton seed No fertilizer-_-240 8 200 9 20Acid phosphate200 Kainit-.-_-200 Cotton seed meal 10 11 240 200 Acid Kainit----- phosphate-} mealL 4.09 4.90 6.85 6.59fl 9.05 885 917 560 100 100 Acid phos ph ate__ 1312 800 368 Kainit_- - 12 240 No fertilizer---- 688 912 I I Acid phosphate- 100 Kainit -- ___ 224 I 4.48 iI 1168 I 368 I 2.72 I I i 336 11 1 Ila 144 1 0.53 1.1 805 245 2.58 Nitrate of soda-- IIIL, -ILCLC I IIII /I 195 Increase in seed cotton per acre due to cottonseed meal, to acid phosphate, to kainit and to nitrate of 1915 Av. 1913 1914 Increase of seed cotton per acre when cottonseed meal was added: 256 416 112 261 To unfertilized plot To acid phosphate plot-------__-24 56 16 32 136 152 64 117 To kainit plot ----------------56 216 96 123 To acid phosphate aad kainit plot Average increase with cottonseed 210 72 133 -----118 meal Increase of seed cotton per acre when acid phosphate was soda. To unfertilized plot ------------- 208 To cottonseed meal plot----------24 220 To kainit plot To cottonseed meal ard kainit plot 140 Average increase with acid phos---136 phate ---Increase of seed cotton per acre when kainit was added: 12 To unfertilized plot --- 108 To cottonseed meal plot 24 To acid phosphate plot To cottonseed meal and acid 56 phosphate plot---4 Average increase with kainit increase of seed cotton per acre from use of different quantities of kainit: 56 To use of 200 pounds kainit----96 To use of 100 pounds kainit added: ----------------- -88 272 276 128 32 -27 203 189 72 340 200 52 104 84 40 195 140 -212 56 -16 -8 -109 35 21 216 28 64 20 112 15 216 64 112 192 216 112 96 133 123. Increase meal in complete fertilizer-36 Increase from use of nitrate of soda -- - - - - - -- - - - -48 Cottonseed meal better than nitrate of soda by------104 from use of cottonseed 0. 152 112 123, WASHINGTON COUNTY, 4 MILES NORTHEAST OF CARSON, NEAR LEROY. W'. F. MELTON 1915. 64 -16 Dark gray loam, with stiffer yellow subsoil. The soil on which this experiment was located, is. described by Louis A. Hurst of the Bureau of Soils, Washington, D. C., as Kalmia Fine Sandy Loam. Mr.. Hurst says that this soil is practically the same as folk soils of this description. The only difference in Nor- the two is in their position on the terraces and upland respectively, the Kalmia soil being located, on what. 196 is known as the Tombigbee valley terraces. The results on this soil are applicable to both series. The land on which this experiment was conducted had been in cultivation about twenty years. The original growth of trees was long-leaf pine and dogwood. Cotton grew on this experimental plot in 1914, and corn, preceded the cotton for two years. The stand was only fair but uniform on all plots. Excessive rains in the early part of July caused heavy shedding and excessive damage, which probably caused the low yields on all plots. No fertilizers or combination of fertilizers, except where cottonseed meal and acid phosphate were used on Plot 5, produced a profit, and this profit was only 78 cents per acre. However, the increase in seed cotton per acre on this plot, 124 pounds, was equalled by the increase on Plot 10, on which the same fertilizers were used with an additional 100 pounds of kainit. Although the average increase in seed cotton per acre was very small on this experiment it indicates that nitrogen is needed. Cottonseed meal at the rate of 200 pounds per acre produced an increase of 81 pounds seed cotton per acre, while acid phosphate and kainit produced increases, respectively, of 24 and 22 pounds seed cotton per acre. Cottonseed meal applied before planting was more effective by 52 pounds of seed cotton per acre than nitrate of soda applied June 10. Increase of seed cotton per acre when cottonseed meal was added: 48 lbs. To unfertilized plot -124 lbs. To acid phosphate plot 68 lbs. To kainit plot -84 lbs. To acid phosphate and kainit plot Average increase with cottonseed meal added: 81 lbs. Increase of seed cotton per acre when acid phosphate was To unfertilized plot ------------------------To cottonseed meal plot -To kainit plot -To cottonseed meal aud kainit plot -- 0 lbs. 76 lbs. 2 lbs. 18 lbs. Average increase with acid phosphate - 24 lbs. Increase of seed cotton per acre when kainit was added: 26 lbs. ---------To unfertilized plot 46 lbs. To cottonseed meal plot 28 lbs. To acid phosphate plot To cottonseed meal and acid phosphate plot _ -- 12 lbs. 22 lbs. Average increase with kainit-- --------- 197 :Increase from use of cottonseed meal in complete 84 lbs. fertilizer increase from use of nitrate of soda---------------32 lbs. 52 lbs. Cottonseed meal better than nitrate of soda by-- Experiments in Washington and Wilcox Counties LEROY CAMDEN 1915 ° 1914 0 0 a) ° 0 ° Z U 0 a) a) 0 )° dy+ KIND OF FERTILIZER UO ° C N + 0 S 0 - .2 Lbs. 200 Cotton seed meal 240 Acid phosphate---No fertilizer .3 1 20 0 Ka init - _ - _ _ 4 200 Cotton seed meal phosphate1 5 200 Cotton seed meal 6 200 Kainit No fertilizer-----. 7.8 240 Acid phosphate-200 Kainit______---200 Cotton seed meal240 Acid phosphate-9 200 Kainit _se__meal 1 Lbs. $ Lbs. 48-0.89 360 0-1.68 312 312 1 .1 2 26 328 416 1243.98 8 416Acid 376 272 312 408 432 Lbs. 728 576 Lbs. $ 294 142 3.47 1.44 42431 4 6 72 0 18 --------- 94 -1.12 28 -2.71 112-2.01 680 424 488 776 56 1.23 40 -2.20 304 0.61 10 11 J 12 Acid phosphate 100 Kainit No fertilizer--__ 20Acid phosphate _ 100 Kainit-----~'100 Nitrate of soda J 240 200 Cotton seed meal 124 0.35 928 432 4.12 320 392 72 -2.64 520 816 296 1.13 WILCOX COUNTY, 7 MILES WEST OF CAMDEN. G. M. Coon-1914. Gray loam soil, with light colored stiffer subsoil. This branch bottom land had been in cultivation many years. A similar experiment with cotton was conducted on these plots in 1913, but the results proved inconclusive because of the damage (lone by dry weather. The largest increase in yield, 432, pounds of seed cotton per acre, was obtained on Plot 10, fertilized as follows per acre: 200 pounds cottonseed meal 198 240 pounds acid phosphate 100 pounds kainit This plot also afforded the largest net profit. The average increase due to cottonseed meal was 158 pounds seed cotton per acre; to acid phosphate, pounds; and to kainit, 31 pounds. Cottonseed meal was superior to nitrate of soda. Increase of seed cotton per acre when cottonseed meal 294 26 added: To unfertilized plot-----------------------To acid phosphate plot _________110lbs. was lbs. 184 lbs. To kainit plot----------------------------264 lbs. To acid phosphate and kainit plot 158 lbs. Average increase with cottonseed meal Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot To kainit plot ---------- 142 lbs. To cottonseed meal plot ______------------ ---- -262 - -- 84 To cottonseed meal and kainit plot 26 Average increase with acid phosphate Increase of seed cotton per acre when kainit was 72 --To unfertilized plot -To cottonseed meal plot _______-----------102 To acid phosphate plot 272 To cottonseed meal and acid phosphate plot -32 lbs. lbs. lbs. lbs. added: lbs. - 38 lbs. lbs. lbs. 51 lbs. quanti- Average increase with kainit different Increase of seed cotton per acre from use ties of kainit: 272 lbs. To use of 200 pounds kainit 400 lbs. To use of 100 pounds kainit Increase from use of cottonseed meal in complete fertilizer Increase from use of --nitrate of soda of - --- -- 264 lbs. 128 lbs. Cottonseed meal better [han nitrate of soda by-- 136 lbs. WJLCOX COUNTY, 34 MILES WEST OF McWILLIAMS. R. F. C HAPPELL-1913. Gray sandy soil, with stiffer yellow subsoil.. For yields of this experiment in 1913 see table on page 201. Comment by the writers on this experiment can be found in Bulletin perinient Station. R. No. 174 of the Alabama Ex- F. CHAPPELL-1915. In 1915. Mr. Chappell made an experiment on the same plots as in 1913. The stand on all plots was uniform, each plot being thinned to the same number of stalks. Boll weevils did some damage, but this damageis reported as being uniform. Corn was planted on_ these plots in 1914. 199 The largest profit was secured where a complete fertilizer containing nitrate of soda was used on Plot 12. This profit was $5.10 per acre, and came from an increase of 248 pounds seed cotton. The next largest increase, 204 pounds seed cotton per acre, came from the application on Plot 9 of 200 pounds cottonseed meal, 240 pounds acid phosphate, and 200 pounds kainit. R. F. CHAPPELL--1916. In 1916, this experiment was conducted on the same plots as in 1915 and 1913. However, the excessive rains of July and the heavy infestation of boll wevils which followed are probably the reasons for the very low yields and increases in seed cotton per acre, together with the financial losses which are shown in the table on page 201. This experiment would not be classed as conclusive but for the fact that it is to be used in an average of several years. R. F. CHAPPELL 1917. In 1917, this experiment was conducted on the same plots as in 1916. The stand was poor but uniform. Boll weevils damaged the test to some extent late in the season. It is especially interesting to compare the results of this experiment in 1917 with the results of the 1916 experiment. The largest average profit in 1917 was $51.96 per acre, which was due to an increase of 592 pounds seed cotton per acre on Plot 12, where an application of 240 pounds acid phosphate, 100 pounds kainit, and 100 pounds nitrate of soda was used. This plot in 1916 made an increase of 24 pounds seed cotton per acre at a financial loss of $11.00. The next largest increase in seed cotton per acre in 1917, 408 pounds, produced at a profit of $23.72, resulted from the application of a complete fertilizer containing 200 pounds kainit on Plot 9. The average increase due to cottonseed meal in 1917 was 193 pounds seed cotton per acre; to acid phosphate, 85 pounds; and to kainit, 177 pounds seed cotton per acre. Nitrate of soda, applied June 9, was more effective by 292 pounds seed cotton per acre than was cottonseed meal, applied before planting. 200 R. F. CHAPPELL, (Average all years.) An average of all years that this experiment was made on the same plots shows that this soil needed a complete fertilizer, and that the best source of nitrogen for the soil was nitrate of soda. The average increase on Plot 12 was 314 pounds seed cotton per acre, where a per acre application of 240 pounds acid phosphate, 100 pounds kainit and 100 pounds nitrate of soda was used. The next largest increase, 256 pounds seed cotton per acre, resulted from an application of a complete fertilizer on Plot 9, which contained the following: 200 pounds cottonseed meal 240 pounds acid phosphate 200 pounds kainit The average increase due to cottonseed meal in all years was 101 pounds seed cotton per acre; to acid phosphate, 45 pounds; and to kainit, 118 pounds. Nitrate of soda, on the average, produced a greater increase than did cottonseed meal by 126 pounds seed cotton per acre. Experiments in Wilcox County MCWILLIAMS MCWLLLIAMS McWILLIAMS MCWILLIAMS McWILLIAMS 1913 1915 4-1 1916,e 6 1917 Average All Years c N ° 2 ° Cn a o a 0 3o "n C/ a, a-, KIND OF 0n o °NC . F EERTILIZER r +, ^Lbs: oN t N co .. ' ) Lbs. $ Lbs. Lbs. ,' $ aN C Lbs. Lbs.$Lb. bs $Ls. -ry b.$ 1 2 2000 240 Cotton seed Acid meal-- Lbs. 560 472 104 16 1.58 -0.98 280 264. 32 16 - 1.59 36 40 80. 12 -1 8 80 16 3 4 ~ phosphate--__ -0.98 No fertilizer--;__-- 456 616 ------ -----( 5.29 1.30 24Z8 280 ----------_ 32 -0.8551 56 -2.22 28 32 4 -- - - 8 4- 0.0 - --004 30 44 5 -. 9 3 9 -- ---5 -48 200 Kainit------------ 152 -1.9 12 3 60 5 j: { 200 Cotton seed meal 608 s 136 304 240 20 IAcid 6i 6 Cotton seed Cotton Kainit_-__.. phosphate-200C meal _____ 44 1 43 02 18 0 8 19 1 88 88 38~.9 38 1.9 30 30 7 7 -- ~0 20 CCseed 81~2 8 2 -59 28 CCeal 38 1.8 66 22 32 200 20 31 1 240 Acid phosphate_r N o fertilizer------- 847 2 488 _- 68160.98 1- 1 248 216 -__ 160 -__ ------ 0.7 _l 6 28 - - 3-989040 1281.18 -- 91 8 64 - -- - - - - - 4 7 80 -. 40 6 4 9 158 -08 -- N o fertilizer -- 56 - - - - - -- 22 -- - - - = - 2 - - -- - -8- - - 399--" 5 8 -- 1 1. 240 Acid phosphate200 Kainit_-.848__ 10 Cotrto sedmal mraeo 60 368 11.87 320 7224 5.10 48 20 -15.96 15 924 48 1.9286 1672 2024 3.26 *I 191,00Kainit oahue ssuc fpoahisedo 0 onso ant 202 Increase in seed cotton per acre due to cottonseed meal, to acid phosphate, to kainit* and to nitrate of soda. 1913 1915 1916 1917 Av. Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot 104 32 8 80 56 -To acid phosphate plot 120 40 4 168 83 To kainit plot 216 40 16 312 146 To acid phosphate and kainit plot 124 162 19 212 129 Average increase with cottonseed meal 141 69 12 193 101 Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot 16 16 12 16 15 To cottonseed meal plot _ 32 24 8 104 42 To kainit plot 92 10 19 160 70 To cottonseed meal and kainit plot 0 132 22 60 54 Average increase with acid phosphate -----------35 46 15 85 45 Increase of seed cotton per acre when kainit was added: To unfertilized plot 152 32 4 36 56 To cottonseed meal plot 264 40 12 268 146 To acid phosphate plot 228 26 11 180 111 To cottonseed meal and acid phosphate plot_ 232 148 26 224 158 Average increase with kainit 219 62 13 177 118 Increase of seed cotton per acre when different quantities of kainit were used: To use of 200 pounds kainit 232 148 26 224 158 To use of 100 pounds ------------ kainit fertilizer -- Increase from use of cottonseed meal in complete - 132 124 94 162 19 19 116 212 90 129 Increase from use of nitrate of soda 248 260 8 504 255 Nitrate of soda better than cottonseed meal by 124 98 -11 292 126 *50 pounds muriate of potash per acre used instead of 200 pounds kainit in 1916. R. F. CHAPPELL 1914. In 1914, Mr. Chappell made an experiment on different plots from the tests previously noted in this bulletin, but on similar soil. This was new land and the results are not averaged in the table, on page 201, but appear below. The two preceding crops were corn. 203 The largest profit, $2.98 per acre, was obtained on Plot 1, fertilized with cottonseed meal alone. However, the largest increase in seed cotton per acre, 352 pounds, was obtained on Plot 12, fertilized per acre as follows : 240 pounds acid phosphate 100 pounds kainit 100 pounds nitrate of soda. The average increase due to cottonseed was 144 pounds seed cotton per acre; to acid phosphate, 57 pounds; while with kainit there was an average loss of 8 pounds. Nitrate of soda, applied June 4, was more effective and more profitable than was cottonseed meal, applied before planting. meal Experiment in Wilcox County MCWILLIAMS 1914 C 0 41 0 o z 0 C . KIND OF PERTFILIZER U , C p. m N UN-+ 1 2 3 5 7 Lbs. 200 Cotton seed meal 240 AXcid phosphate-_ No fertilizer -- _ 200 Kainit__ _ _ 200. Cotton seed meal 240 Acid phosphate200 Cotton seed meal 200 Kainit- .-- 240 200 200 240 200 200 240 100 240 100 100 No fertilizer---phosphate- Lbs. 1096 1016 824 904 1088 1112 904 Lbs. $ 272 2. .98 192 2, 54 -- -60 -0. .08 224 0. .25 228 0. .62 _ -- Acid --0. 10 11 12 Kainit Cotton seed meal Acid phosphate Kainit _ _ - Cotton seed meal Acid phosphate__ Kainit fertilizer phosphate- 1040 1144 1104 912 1264 134 .13 236 194 0.89 1.11 No Acid --- - $--- Kitaniof soda- 352 2.36 204 Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot 272 lbs. To acid phosphate plot 32 lbs. To kainit plot 168 lbs. To acid phosphate and kainit plot-102 lbs. Average increase with cottonseed meal 144 lbs. Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot _________192 lbs. To cottonseed meal plot -48 lbs. To kainit plot 74 lbs. To cottonseed meal and kainit plot 8 lbs. Average increase with acid phosphate To cottonseed meal plot _____44 To acid phosphate plot 57 lbs. lbs. lbs. Increase of seed cotton per acre when kainit was added: To unfertilized plot 60 lbs. 12 lbs. -8 lbs. Increase of seed cotton per acre from use of different quantities of kainit: Average increase with kainit To use of 200 pounds kainit To use of 100 pounds kainit __30 12 lbs. lbs. 102 lbs. 260 lbs. 158 lbs. To cottonseed meal and acid phosphate plot -58 Increase from use of cottonseed meal in complete fertilizer Increase from use of nitrate of soda Nitrate of soda better than cottonseed meal by BUTLER COUNTY, 7 MILES NORTHEAST OF GREENVILLE. E. L. GRAYDON-1914. Gray sandy soil, with fine yellow sandy subsoil. The land on which this experiment was conducted had been in cultivation many years. The crop in 1913 was cotton; and corn, in 1912. The original forest growth was oak, hickory and short-leaf pine. The entire season was reported as having been very dry. The largest increase in yield of seed cotton per acre, 384 pounds was obtained on Plot 5, fertilized with 200 pounds cottonseed meal and 240 pounds acid phosphate. This plot also gave the largest profit, $3.77 per acre. The second largest increase, 296 pounds seed cotton per acre, and the second largest profit, $3.51 per acre, were obtained on Plot 1, fertilized with 200 pounds cottonseed meal per acre. The average increase attributable to cottonseed meal was 180 pounds seed cotton per acre; to acid phosphate, 40 pounds; while with kainit, there was an average loss of 40 pounds seed cotton per acre. Cottonseed meal, applied at the rate. of 200 pounds per acre before planting in a complete fertilizer, was 205 not as effective by 96 pounds seed cotton per acre as was nitrate of soda, applied the first half of June. E. L. GRAYDON 1916. In 1916, Mr. Graydon made a similar experiment with cotton on these plots. The experiment was preceded by a corn experiment of the same kind in 1915. The stand on all plots was good. The excessive rains in July produced a heavy growth of foliage, which was favorable to boll weevil infestation; hence the low yield recorded in the tables. In this unfavorable year it is especially noticeable that satisfactory profits were made on some of the plots. On plot 12, the largest profit, $10.56 per acre, and the largest increase due to fertilizers, 304 pounds seed cotton per acre, were obtained. This plot was fertilized with 240 pounds acid phosphate 100 pounds kainit 100 pounds of nitrate of soda. Increases of 228 pounds seed cotton per acre and 176 pounds seed cotton per acre were obtained on Plots 10 and 9, respectively. The average increase in this unfavorable year attributable to cottonseed meal was 73 pounds seed cotton per acre; to acid phosphate, 47 pounds; and to kainit, 39 pounds seed cotton per acre. One hundred pounds of kainit was more effective by 52 pounds seed cotton per acre than was 200 pounds. Nitrate of soda, applied about June 1, was more effective by 76 pounds seed cotton per acre than cottonseed meal, applied before planting. E. L. GRAYDON-1918. After making a fertilizer experiment with corn on these plots in 1917, Mr. Graydon conducted a third experiment with cotton on the same plots. In 1918, with less rainfall and a much lighter infestation of boll weevils than in 1916, increases and profits on practically all plots were greater than in 1916. The largest profit, $19.48 per acre, and the largest increase due to fertilizers were obtained on Plot 9, fertilized as follows: 200 pounds cottonseed meal 240 pounds acid phosphate 120 pounds alkali salts (equivalent to 200 pounds kainit) 206 .The next largest profit, $17.94 per acre, was afforded by Plot 5, fertilized with 200 pounds cottonseed meal, and 240 pounds acid phosphate. This plot, however, ranked fourth in increase in seed cotton per acre. Plots 12 and 10 afforded increases of 256 and 250 pounds seed cotton per acre, respectively. The average increase in seed cotton per acre due to the application of 200 pounds cottonseed meal was 148 pounds; to 240 pounds acid phosphate, 142 pounds; while 120 pounds of alkali salts (equivalent to 200 pounds kainit) gave an average increase of 88 pounds :seed cotton per acre. Cottonseed meal, applied before planting, was about ,equally as effective as nitrate of soda, applied when the plants were about six inches tall. E. L. GRAYDON, (Average all years.) Averaging the results of the three years of experimental work on these plots, it is seen that Plot 12, receiving a mixture containing 240 pounds acid phosphate, and 100 pounds kainit (or its equivalent in some ,other potash fertilizer), and 100 pounds nitrate of soda, produced, on the average, an increase of 283 pounds of seed cotton per acre. Plots 5, 9 and 10 produced increases which were about equal. (See table for methods of fertilization.) Their increases ranged from 223 to 231 pounds seed cotton per acre. The three years which are averaged on this experiment show that Plot 12 produced an average profit of $9.51 per acre. It might be well to add that in 1914, the price used for lint was 6.8 cents per pound; in 1916, 20 cents per pound, and in 1918, 30 cents per pound. The average increase for the three years attributable to 200 pounds cottonseed meal was 134 pounds of seed cotton per acre; to 240 pounds acid phosphate, 77 pounds; and to potash fertilizers (equivalent to 200 pounds of kainit), 29 pounds seed cotton per acre. Nitrate of soda, applied when the plants were about six inches tall, gave an increase of 59 pounds more seed cotton per acre than did cottonseed meal, applied before planting. Experiments in Butler County GREENVILLE GREENVILLE GREENVILLE* GREENVILLE 1914 0oo000 4-J 0 0 o 1916 1918 Average all Years 0 C O * Z o ~ ~ERTILZER Fk KIND OF o N -' 0 aV N a To 0) e c 75L~c 0- ~ = ~ ca CJ~ ~ ~ 2 b ti O bA 0 t 0 0 P~r7:1 1 2 3 Lbs. 200 Cotton seed meal 240 Acid phosphate---No fertilizer Lbs. 600 480 304 Lbs. $ 296 3.51 176 2.19 128 384 1.42 3.77 Lbs. 96 48 16 Lbs. $ 80 2.66 32 0.36 Lbs. 96 120 56 Lbs. $ 40 -1.10 64 4.52 Lbs. 264 216 125-- Lbs. $ 105 1.69 91 2.36 ------ - 4 , { 200 Kainit 200 Cottonseed meal 240 Acid phosphate- 456 736 24 88 8-13.38 72 0.06 40 312 -26-10.12 236 17.94 173 379 37 231 7.36 7.22 200 . Cotton 7No seed meal __ fertilizer-- 648 400 528 272 112 1.58 --- ~.2400 240 200 240 100 ainitopat -0-62 96 16 80 76 -11.34 ----10.25 304 96 218 182 11.22 ---10.24 349 171 190 123 0:49 -0.63 104 216 280 64 296 309 20Cotton seed meal) Acid phosphate_ Cotton seed meal) Acid phosphate Kainit---No fertilizer 616 640 752 184 192 288 -2.03 176 228 -6.05 418 400 168-424 316 250 19.48 15.85 427 440 232 225 223 3.80 7.32 10 11 . ( --- 1.16 0.96 4.96 464 -_ s ht12- _ 100 Nitrate of soda- 368 A ph 20 i 304 100 ainit 10.56 K 256 - -- 17.01 515 283 9 51 * 120 pounds alkali salts used as source of potash instead of 200 pounds kainit in 1918. 208 Increase in seed cotton per acre due to cottonseed meal, to acid phosphate, to kainit* and to nitrate of soda. Increase of seed cotton per acre when cottonseed meal was added: 1918 Av. 1914 1916 To unfertilized plot-------------296 80 40 105 172 140 208 40 To acid phosphate plot_ 244 153 144 72 To kainit plot _-_ 100 134 102 72 To acid phosphate and kainit plot Average increase with cottonseed 134 180 73 148 meal Increase of seed cotton per acre when acid phosphate was added: 64 91 32 176 To unfertilized plot -----------92 196 88 -8 To cottonseed meal plot 87 208 16 68 To kainit plot----------------39 98 96 To cottonseed meal and kainit plot -88 Average increase with acid phosphate-- 40 47 142 77 Increase of seed cotton per acre when kainit was added: To unfertilized plot _-To cottonseed meal plot ___To acid phosphate plot - 128 To cottonseed meal and acid ---------- 104 200 phosphate plot 39 -40 _ Average increase with kainit Increase from use of cottonseed 100 72 in complete fertilizer _ Increase from use of nitrate of soda --------------168 176 -- -24 -64 8 0 44 -26 178 118 37 51 33 80 88 134 140 -5 29 102 161 Nitrate of soda better than cottonseed meal by ____________ 96 76 6 59 *120 pounds alkali salts were used instead of 200 pounds kainit in 1918. BUTLER COUNTY, 5 MILES EAST OF GREENVILLE. W. C. WALTON 1915. Red sandy loam, with stiffer red subsoil. The land on which this experiment was conducted had been in oats in 1914; in corn in 1913, which was preceded by cotton. Due to dry weather, the seed which were planted on April 2, did not come up until about May 10. As a whole, the stand was uniform on all plots. No fertilizer or combination of fertilizers made a very large profit. However, an increase in seed cotton per acre was secured on every plot where fertilizers were applied. The largest profit from fertilizers, $3.34 per acre, was secured on Plot 10, where the following mixture was use: 200 pounds cottonseed meal per acre 240 pounds acid phosphate per acre 100 pounds kainit per acre. 209 The average increase due to 200 pounds cottonseed meal was 57 pounds seed cotton per acre; to 240 acid phosphate, 52 pounds seed cotton per acre; and to 200 pounds kainit, 88 pounds seed cotton per acre. One hundred pounds kainit per acre was about equally effective as 200 pounds. Cottonseed meal was slightly superior to nitrate of soda. Increase of see.d cotton per acre when cottonseed meal added: To unfertilized plot--64 To acid phosphate plot-----------------------64 To kainit plot-------------------------------44 To'acid phosphate and kainit plot-------------56 Average increase with cottonseed meal-57 Increase of seed cotton per acre when acid phosphate added: To. unfertilized plot--------------------------4 To.cottonseed meal plot-4 To kainit plot ___-__-_______-__ --------94 To cottonseed meal and kainit plot------------ 106 To unfertilized plot-------------------------- pounds. was lbs.lbs. lbs. lbs. lbs. lbs. was lbs. lbs. Average increase with acid phosphate-------- 52 lbs. Increase of seed cotton per acre when kainit was added: To cottonseed meal plot-----------------------30 lbs. To acid phosphate plot---------------------- lbs.. 50 lbs.. To cottonseed meal and acid phosphate plot Average increase with kainit---------88 Increase 140 lbs.- ties of kainit: To use of 200 pounds kainit----------132 lbs. To use of 100 pounds kainit------------------140 lbs. Increase from use of cottonseed meal in complete fertilizer-------------------------------------56 lbs.. Increase from use of nitrate of soda-----------------_ __ 8 lbs. Cottonseed meal better than nitrate of soda by of seed cotton per. acre fronm use of different quanti- 132 lbs. lbs.- -- _ 48 lbs.- 210 Experiments in Butler County GREENVILLE GEORGIANA 1914 1915 0 N o OO0 a 0 ° ' ) KIND OF FERTILIZER ° o' CN Lbs. 1184 1016 960 1024 1056 1016 984 _ 1 '2 3 4 5 6 7 Lbs. 200 Cotton seed meal 240 Acid phosphate __ INo fertilizer.__, Kainit ____ __-__ N-200 200 Cotton seed meal 240 Acid phosphate._S 200 Cotton seed meal 200 Kainit__________ No fertilizer---- Lbs. 288 288 224 280 304 336 248 384 Lbs. $ 64-0.18 4 -1.50 0.06 50 68-1.69 94 -1.12 144 4 200 208 Lbs. 224 56 $ 1.93 0.45 -- 58 -0.12 84 2.83 38 _ 8 9 10 - 3.56 2. 4.50 11 12 Acid phosphate-Kainit38 Cotton seed meal Acid phosphate _ Kainit_______ Cotton seed meal Acid phosphate J'ainit _ __ No fertilizer_____ 240 Acid phosphate-100 Kainit_ 100 Nitrate of soda 240 200 200 240 200 200 240 100 2410 1.86 3.34 8 72 112 432 432 216 376 1104 1168 -2.92 1__-----160 1.23 1264 184. -1.33 BUTLER COUNTY, 4 MILES WEST OF GEORGIANA. J. T. PORTER-1914. Fine gray soil, with yellow stiffer subsoil. This land had been many years in cultivation. The two preceding crops were cotton, preceded by corn. The stand on all plots was good. In this dry year no combination of fertilizers and only one fertilizer,-cottonseed meal applied alonegave an increase large enough to be profitable. The increase due to cottonseed meal alone was 224 pounds of seed cotton per acre, and a profit of $1.93. The average increase due to cottonseed meal was 74 pounds seed cotton per acre; while with acid phosphate and with kainit, there was an average loss of 25 pounds and 47 pounds of seed cotton per acre, respectively. Nitrate of soda, applied June 16, was slightly more effective than was cottonseed meal used before planting. increase , o seed, cotton per acre when cottonseed meal was added: To unfertilized plot, ------ -----224 lbs., To acid phosphate plot 28 lbs. To kainit plot -- ________________-20 lbs. To acid phosphate and kainit plot-64 lbs. Average increase. with, cottonseed meal 74 lbs. Increase of seed cotton per acre when acid phosphate was added: 56lbs. To unfertilized plot- __------___-----------lbs. To cottonseed meal plot---------------------140 lbs. To kainit plot_---------------------50 34 lbs. To cottonseed meal and kainit plot -25 lbs. Average increase with acid phosphate Increase of seed cotton per acre when kainit was added lbs. To unfertilized plot------------------58 To cottonseed meal, plot--------------------____-48 lbs. To acid phosphate plot -12,lbs. To cottonseed meal and acid phosphate'plot Average increase with kainit -47'lbs. Increase' of seed cotton per' acre from use'of different quantities of kainit: -12lbs. To use of 200 pounds kainit To use of 100 pounds kainit L Increase from use of cottonseed meal' Increase from use' of nitrate" of soda-136 Nitrate 'of soda better than cottonseed meal by of 211 CONE'CUH1-I COUNT, lbs. lbs. 72.lbs. 11 MILES EASTOF 64 HERBERT. -- - 28 lbs. EVE1RGREEN',NEAR 'Gray'on: which The soil G. M. HARPER 1915. sandy loam, with red 'sdhdysubsoil. this: experiment" was' located is It originally mapped burg pine trees;' but had been cleared of this forest growth many years. No legume had. grown on this soil 'foif many years. The-'stand on' all plots was injured by cotton wilt, the. damage being about. uniform. No, fertilizer. or; combination Qf fertilizers produced a. profit of. more ,than acre. Increases of 144, and 132 pounds of Fine Sandy' Loam. by the United States Bureau' of Soils :as OraigegrewV long-leaf on Plots .9.and., 5, which, were fertilized per acre., respectively, as follows: 200 ,pounds cottonseed..meal 240. pounds ,acid phosphate 200 pounds kainit. and 200 pounds cottojmeed meal 240 pounds $acid phosphate. seed $2.05per co'tton ,per .acre ,were obtained; 212 The average increase attributable to cottonseed meal -was 60 pounds seed cotton per acre; to acid phosphate, 29 pounds; and to kainit, 55 pounds seed cotton per acre. Nitrate of soda, applied when the plants were about 6 inches high, made an increase of 40 pounds more seed cotton per acre than did cottonseed meal, applied before planting. G. M. HARPER-1916. In 1916, Mr. Harper made an experiment with cotton on the same kind of soil on an area which was adjacent to the plots of 1915. This area was planted to a corn experiment in 1915, and was fertilized exactly as the cotton fertilizer plots were fertilized. The stand on all plots was uniform, each being thinned to the same number of plants per plot. The low yields in this experiment are probably due to heavy boll weevil infestation which followed the excessive rains of July 4, 5 and 6. The only profit recorded in the experiment was on Plot 1, fertilized with cottonseed meal alone at the rate of 200 pounds per acre. Increases in seed cotton per acre of 116 and 112 pounds were obtained from Plots 9 and 1, respectively. The increase on Plot 9 was produced at a financial loss of $10.67 per acre. The average increase due to cottonseed meal was 82 pounds seed cotton per acre; to acid phosphate, 15 pounds; while kainit resulted in an average loss of 2 pounds of seed cotton per acre. Nitrate of soda, applied May 31, was equally as effective as was cottonseed meal, which was applied before planting. G. M. HARPER-1917. In 1917, the same experiment was repeated on the same plots as the experiment of 1916. All plots were thinned to the same number of stalks on each. The growing season was favorable to the production of cotton, and only a few boll weevils were present. The largest increase, 328 pounds seed cotton per acre, and the greatest profit, $28.92 per acre, were secured from Plot 5, fertilized with a mixture containing: 200 pounds cottonseed meal 240 pounds acid phosphate. An increase of 272 pounds seed cotton per acre was 213 secured on Plot 1, where cottonseed meal alone was used at the rate of 200 pounds per acre; also on Plot 12, an increase of 264 pounds seed cotton per acre was made when fertilized per acre with 240 pounds acid phosphate 100 pounds kainit 100 pounds nitrate of soda. On this soil in 1917 nitrogen was, on the average, the most important element. The average increase attributable to cottonseed meal was 164 pounds seed cotton per acre; to acid phosphate, 73 pounds; while kainit, on the average, resulted in a loss of 28 pounds seed cotton per acre. Nitrate of soda, applied May 24, was more profitable and produced an increase of 70 pounds more seed cotton per acre than did cottonseed meal, applied before planting. G. M. HARPER-1918. In 1918, Mr. Harper conducted the fertilizer experi,ment with cotton on the same plots as in the preceding two years. The stand was uniform but only fair. Each plot had the same number of stalks as every other plot. Rust is reported as doing some damage on the plots not fertilized with potash fertilizers. The largest profit, $28.82 per acre, and the largest increase in seed cotton per acre, 378 pounds, were obtained on Plot 6, fertilized per acre as follows: 200 pounds cottonseed meal 120 pounds alkali salts (equivalent to 200 pounds kainit) The next largest profit, $22.89 per acre, and an increase of 314 pounds seed cotton per acre, were obtained on Plot 10, where 200 pounds cottonseed meal, 240 pounds acid phosphate, and 60 pounds alkali salts (equivalent to 100 pounds kainit) were used. As in 1917, nitrogen was the most important element needed on this soil, and when applied in the form of cottonseed meal at the rate of 200 pounds per acre gave an average increase of 224 pounds seed cotton per acre. Next in importance, on the average, was the potash fertilizer. This year potash was supplied in the form of alkali salts at the rate of 120 pounds per acre and gave an average increase of 150 pounds seed cotton per acre. Acid phosphate when applied at the rate of 240 pounds per acre produced an average increase of 35 pounds seed cotton per acre. 214 It appears that in this year of much rust damage,. potash was very necessary; however, when applied in the form of 60 pounds alkali salts, it produced a better increase in seed cotton per acre by 46 pounds than when applied at double this rate. Cottonseed meal applied before planting was much more effective than was nitrate of soda, applied May 27. G. M. HARPER, (Average all years.) The table on page 215 shows that the average increase due to the application of 200 pounds cottonseed meal and 240 pounds acid phosphate, gave an increase of 166 pounds of seed cotton per acre at an average profit of $9.39. Although this is not the largest increase in seed cotton per acre, it is the largest profit. The average increase attributable to cottonseed meal, in the average Qf all tests, wvas 133 pounds seed cotton per acre; to acid pho'sphate, 38 pounds; and to kainit, or its equivalent in some other p6tash fertilizer, 44 pounds seed cotton per acre. Cottonseed meal applied before planting on the average, was about equally as effective as nitrate of soda applied when the plants were about six inches high. Experiments in Conecuh County by G. M. Harper. HERBERT HERBERT HERBERT HERBERT' HERBERT 1915 N 1916 o 0 -o 1917 e c 0 o 0 N. 1918 0 0. Average All Years ~0 KIND OF FERTILIZER 0 o 0 a 0b N I 0° ao EnONo0 Nn d C) " 0 Vm, 0 , QA C 1 2 3 Lbs. 200 Cotton seed meal 240 Acid phosphate---No fertilizer _----- Lbs. 504 448 440 Lbs. $ 64 -.0.18 8 -1.33 98 132 2.05 1.13 Lbs. 296 176 184 ------------36 40 Lbs. 112 8 $ 5.12 -2.72 Lbs. 640 480 368 Lbs. 272 112 -- $ -Lbs. 24.92 10.16 888 688 840 Lbs. 96 -104 $ -Lbs. 5.06 582 448 474 Lbs. 136 $ 8.73 -13.96 -1.32 2 -1.96 38-6.52 -79246 4 5 6 8 200 200 S240 200 Kanit.---------Cotton seed meal Acid phosphate-Cotton seed meal 200 I~ainit __--. 528 552 504 400 136 200 184 136 _-16.77 -2.52 392 672 536 504 36 -10.04 328 28.92 204 182 3.44 3.86 944 1152 800 54 164 378 62 1002 28.82 2.96 592 594 0 488 166 178 89 9.39 4.10 3.40 94 -1.12 88 -0 07 36-14.73 No fertilizer-__-___ -320--764 ___8 22 -14.41 i 240 Aihsht 200 Cotton seed meal 240 488 160 19 Acid phosphate- 544 144 -0.60 256 116 -10.67 - 504 180 -1.36 976 268 14.20 570 177 0.39 10 240 .Acid phosphate 464 64 -2.99 100 Kainit.. J1Nofriizr_-__40.4 11- Nofetiizr--40-44328 240 Acid phosphate12~ 10Ntaeo 100 Kainit __504 oa 104 -1.23 224 82 6.29 520 194 - 7.18 - 992 314 22.89 575 380 164 5.00 648 ---------8 48 224 80 -6.69 592 264 15.88 200 10.85 542 162 4.70 *In 1918, 120 pounds of alkali salts used as source of potash in stead of 200 pounds of kainit. 216 Increase in seed cotton per acre due to cottonseed meal, to acid phosphate, to kainit* and to nitrate of soda. Increase of seed cotton per acre when cotton seed meal was added: 1915 1916 1917 1918 Av. To unfertilized plot 64 112 272 96 136 To acid phosphate plot __ 124 48 216 268 164 To kainit plot 4 72 168 324 140 To acid phosphate and kainit plot 56 94 -2 206 89 Average increase with cottonseed meal 60 82 164 224 133 Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot 8 -8 112 -104 2 To cottonseed meal plot_68 -7 56 68 30 To kainit plot ------------ 10 58 146 8 51 To cottonseed meal and kainit plot 50 80 -24 -110 -1 Average increase with acid phosphate -------29 15 73 35 38 Increase of seed cotton per acre when kainit was added: To unfertilized plot 98 -36 36 54 38 To cottonseed meal plot _ 30 76 -68 282 42 ------------ To acid phosphate plot _ To cottonseed meal and acid phosphate plot--.. 12 76 -148 104 11 Average increase with kainit* 55 2 -28 152 44 Increase of seed cotton per acre from use of different quantities of kainit: * To use of 200 pounds kainit--12 76 -148 104 11 To use of 100 pounds kainit-----68 42 -134 150 -3 Increase from use of cottonseed meal in complete fertilizer 56 94 -2 206 89 Increase from use of nitrate of soda-----96 92 68 92 87 Cottonseed meal better than nitrate of soda by -40 2 -70 114 2 *In 1918, 120 pounds alkali salts per acre used instead of 200 pounds kainit. CONECUH COUNTY, 11/2 MILES SOUTH OF EVERGREEN. 80 30 70 166 87 -------- W. F. CHANDLER-1914. Red sandy loam, with stiffer red subsoil. This upland soil had been in cultivation many years. Cotton had been the preceding crop for three years. 217 The land is subject to blight, but no report is made of this disease having done damage. No fertilizer or combination of fertilizers proved highly profitable on this soil in 1914. However, on Plot 12 an increase of 304 pounds seed cotton per acre and a profit of $1.31 was obtained from a mixture of 100 pounds nitrate of soda 240 pounds acid phosphate 100 pounds kainit. Nitrate of soda applied June 2 gave a larger increase by 328 pounds of seed cotton per acre than did cottonseed meal when both were applied in a complete fertilizer. increase of seed cotton per acre when cottonseed meal added: To unfertilized plot--------------------------176 To acid phosphate plot _____-----------136 To kainit plot To acid phosphate and kainit plot------24 Average increase with cottonseed meal--------18 Increase of seed cotton per acre wken acid phosphate added: To unfertilized plot--------------------------96 To cottonseed meal plot--------------------- 216 was lbs. -88 lbs. lbs. lbs. lbs. was lbs. lbs. lbs. To kainit plot-------------- _---------------_-148 To cottonseed meal and kainit plot _----------- 84 lbs. Average increase with acid phosphate------- -88 Increase of seed cotton per acre when kainit was To unfertilized plot---------------------__---12 added: lbs. lbs. To cottonseed meal plot--------------------- 252. lbs. To acid phosphate 'plot---------------------_232 lbs. To cottonseed meal and acid phosphate plot - - 120 lbs. Average increase with kainit Increase ties of kainit: of seed cotton per- acre from use To use of 200 pounds To use of 100 pounds kainit-----------------fertilizer ----------------------------------Increase from use of nitrate of soda-------------- of different quantikainit ----------------120 lbs. 16 lbs. --------------- 148 lbs. Increase from use of cottonseed meal in complete Nitrate of soda better than cottonseed meal by _ - -24 lbs. 304 lbs. 328 lbs. 218 Experiments ,i n_ Gonecuh and 1914 0 O ° . .n Escambia Counties NoKoIs EVERGREEN 1914 ° p 0 ac N O 0 0 Sa KIND OF FERTILIZER O i - s+s U -. 0Z U U 1 2. 3 4 Lbs. Lbs. 200 Cotton'seed meal 912 "240 Acid phosphate..._ _ 832 No fertilizer.--_-__ Lbs. $ 176 0.87 96 0.43 Kainit----------200" Cotton seed meal 240 Acid phosphate I~ant _____ 200 - 640 6 576- 736 720 - -- Ls. 664 664 Lbs. 648 $ 16 16 -1.33 2.65 2.12 12 -1.14 816 160 -40 -76 =6:7 94 22 0 0 200 Cotton seed meal 6 . o 7 No fertilizer----___ 624 -- -680 848 168 264 0.62 240 Acid phosphate..% 200 Kainit -- ---- - S ,® 512 -136-6.07 512 200 Cotton seed meal 9 240 Acid phosphate - 10 11 5200 12 ____ -Cotton seed meal) 240 Acid phosphate--100 Kainit No fertilizer_ 240 Acid phosphate.--100 Kainit.__100 Nitrate of soda 200 Kainit -160 -9.60-944 -0.27 -0.80 ) 672-24-5.91 ______ 888 680 208 720, 1024 304 1.31 984 304 1.31 SESCAMBIA COUNTY, 1 MILE EAST OF NOKOMIS. N. BP. RHODES, eland ON, THE FARM OF Gray sandy soil, with Thy on which had been in cultivation for the past fifteen years. Long-_ leaf pine 1911. this- experiment stiffer red'subsoil. was conducted Corn was H. W. CURRIE .1914. grown on" the -land in "1913--cotton in 1912' and corn in A uniform stand was secured on all was, the original forest growth. 12, receiving 240 pounds acid phosphate, 100 pounds kainit, and 100 pounds nitrate of soda (applied late) made an increase of 304 pounds seed cotton per acre, at a profit of $1.31 per acre. The next largest increase was on Plot 9, which received an application of 200 pounds cottonseed meal 240 pounds acid phosphate 200 pounds kainit. The increase in this plot was 264 pounds seed cotton plots. Plot 219 per acre, but it resulted in a financial loss of 27 cents per acre. Kainit when applied alone on Plot 4, at the rate of 200 pounds per acre, gave a profit of $2.12 per acre, although the increase in seed cotton was only 160 pounds per acre. An analysis showing the value of the different fertilizers shows that potash in the form of kainit was more important on this soil than was either nitrogen or phosphate. Kainit when applied at the rate of 200 pounds per acre gave an increase of 157 pounds of seed cotton per acre. Cottonseed meal applied at the rate of 200 pounds per acre gave an increase of 83 pounds seed cotton per acre. Acid phosphate when applied at the rate of 240 pounds per acre gave an increase of 51 pounds seed cotton per acre. Two hundred pounds of kainit gave an increase per acre of more than double that secured when only 100 pounds were applied. Nitrate of soda applied May 28 was more effective and more profitable by 96 pounds seed cotton per acre than its equivalent amount of cottonseed meal applied before planting. Increase of see,d cotton per acre when cottonseed meal was added: To unfertilized plot 16 To acid phosphate plot 148 To kainit plot 72 To acid phosphate and kainit plot 96 Average increase with cottonseed meal-83 Increase of seed cotton per acre when acid phosphate added: lbs. lbs. lbs. lbs. lbs. was To unfertilized plot ----------16 lbs. To cottonseed meal plot_----148 lbs. To kainit plot ----------------------------8 lbs. To cottonseed meal and kainit plot 32 lbs. Average increase with acid phosphate 51 lbs. Increase of seed cotton per acre when kainit was added: To unfertilized plot----------160 lbs. To cottonseed meal plot --------------------216 lbs. To acid phosphate plot---------152 lbs. To cottonseed meal and acid phosphate plot _ 100 lbs. Average increase with kainit 157 lbs. Increase of seed cotton per acre from use of different quanti- ------------- ------ --------------_ - To use of 100 pounds kainit Increase frof use of cottonseed mealIncrease from use of nitrate of soda-192 To use of 200 pounids kainit ties of kainit: ---------------- ---------- 100 lbs. 44 lbsk , Nitrate of soda better than cottonseed meal by 96 lbs. lbs. 96 lbs. 220 CRENSHAW COUNTY, 1/2 MILE NORTH OF BRANTLEY. A. C. CAUSEY-1914. Dark gray sandy soil, with yellow sandy subsoil. This experiment was made on a soil which had been cleared of its original forest growth of oak, pine and hickory for about fifteen years. Cotton had preceded the experiment for at least three years. The land is subject to cotton wilt, but little or no damage was done in 1914. The stand was good on all plots. In this dry year no fertilizer or combination of fertilizers proved very profitable. However, an increase of 302 pounds seed cotton per acre, produced at a profit of $2.24 per acre, was made on Plot 6, fertilized with cottonseed meal and kainit at the rate of 200 pounds each. This plot, however, did not produce the largest profit. The experiment indicates that in 1914, potash was badly needed on this soil, and nitrogen way needed to a less extent. The average increase due to 200 pounds kainit was 177 pounds seed cotton per acre, and to 200 pounds cottonseed meal, 70 pounds seed cotton per acre. Two hundred pounds kainit was more effective on this soil than was 100 pounds. Nitrate of soda produced 144 pounds seed cotton per acre more than did cottonseed meal, each being applied in a complete fertilizer. Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot ------------------------- 264 lbs. To acid phosphate plot 84 lbs. To kainit plot-84 lbs. To acid phosphate and kainit plot 14 lbs. Average increase with cottonseed meal 70 lbs. - ------------ ------ Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot To cottonseed meal plot ------------------------ To kainit plot_-To cottonseed meal and kainit plot Average increase with acid phosphate ------ -- 10 lbs. -80 lbs. 94 lbs. 316 lbs. 32 lbs. Increase of seed cotton per acre when kainit was added: To unfertilized plot ----------------------- 218 lbs. To cottonseed meal plot -------------------- 38 Ibs. To acid phosphate plot -------------------- 176 lbs. To cottonseed meal and acid phosphate plot _ Average increase with kainit- _------177 274 lhs. lbs. 221 Increase of seed cotton per acre from use different quantities of kainit: To use of 200 pounds kainit----------------274 lbs. To use of 100 pounds kainit----------------196 lbs. Increase from use of cottonseed meal-------------14 lbs. Increase from use of nitrate of soda-------------158 lbs. Nitrate of soda better than cottonseed meal by 144 lbs. of Experiments in Crenshaw County BRANTLEY BRANTLEY 1914 0 0 0;>0 1915 0 0 KIND OF z I FERTILIZER1;ro Lbs. 200 Cotton seed meal-240 Acid phosphate_ No fertilzer a ;I 0 N Lbs. Lbs. $ 576 -152 -9.69 728 728 .1 2 3 4 ------736- Lbs. 1000 768 Lbs. $ 264 2.81 32 -0.98 218 -52 302 3.40 0 10 -1.68 -1.82 5 63 .7 200 200 .240 200 200 240 200 200 240 200 200 240 Kainit-------------968 Cotton seed meal i 712 7. Acid phosphate Cotton seed meal 1080 Kainit--_____ No fertilizer 728 2.24 936 688- 238 5.21 -- --- 792 9 Acid phosphate-_ Kaini___-___-_ -----208- 960 9 10 Cotton seed meal Acid phosphate_ Kainit-------Cotton seed meal Acid KainitNo fertilizer 936 816 632 222 -1.20 144 -2.21 984 1008 720 - 280 296 --- 5.38 7.21 - 11 12 S 100 100 100 phosphate- ---- --- 240 Acid phosphate Kainit-----Nitrate cf ---- -288 0.96 soda- 920 1056 336 8.97 A. C. CAusEY-1915. The same experiment was made by Mr. Causey in. 1915, on different plots but on a similar soil. Corn wais the preceding crop, and it was preceded by cotton. The stand was good on all plots. Boll weevils did some damage. The results show that Plot 12 gave a profit of $8.97 per acre, with an increase of 336 pounds seed cotton per acre. This plot was fertilized per acre with 100 pounds nitrate of soda 240 pounds acid phosphate 100 pounds kainit. 222 largest increase in seed cotton per acre, 296 pounds, was obtained from Plot 10, fertilized as follows: 200 pounds cottonseed meal per acre 240 pounds acid phosphate per acre 100 pounds kainit per acre. The average increase due to kainit in 1915, as in The next largest profit, $7.21 per acre, and the second. 1914, was much larger than the average increases due to other fertilizers. This year it was 155 pounds seed =cotton per acre; while acid phosphate and cottonseed meal gave average increases of 141 pounds and 104 pounds, respectively. Nitrate of soda, as in 1914, was more effective than cottonseed meal. Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot -152 lbs. To acid phosphate plot -220 To kainit plot ______228 To acid phosphate and kainit plot lbs. lbs. 120 lbs. 104 lbs. Average increase with cottonseed meal increase of seed cotton per acre when acid phosphate was added: To unfertilized plot 0 lbs. To cottonseed meal plot 372 lbs. To kainit plot 150 lbs. To cottonseed meal and kainit plot 42 lbs. Average increase with acid phosphate 141 lbs. Increase of seed cotton per acre when kainit was added: To unfertilized plot 10 lbs. To cottonseed meal plot 390 lbs. To acid phosphate plot 160 lbs. To cottonseed meal and acid phosphate plot 60 lbs. Average increase with kainit 155 lbs. Increase of seed cotton per acre from use of different quantities of kainit: To use of 200 pounds kainit ----------------60 lbs. To use of 100 pounds kainit ---------------76 lbs. Increase from use of cottonseed meal in complete fertilizer ---------------------------------120 lbs. Increase from use of nitrate of soda -- 160 lbs. Nitrate of soda better than cottonseed meal by 40 lbs. PIKE COUNTY, 8 MILES SOUTH OF TROY. H. W. AND T. V. BALLARD-1914. Red sandy loam, with stiffer red subsoil. This experiment was located on land which grew cotton in 1913. The preceding crop, according to Mr. Ballard, was rather heavily fertilized with a mixture containing one-third cottonseed meal and two-thirds acid phosphate. 223 fertilizer or combination -highly profitable on this soil in 1914. Increases of 174 pounds-seed cotton per. acre, and 168 pounds seed cotton per acre were received from Plots 4 and 8, respectively. The average increase due to 200 pounds cottonseed meal was 24 pounds seed cotton per acre; to 240 pounds phosphate, 25 pounds; and to 200 pounds kainit, 75 pounds seed cotton per acre. Nitrate of soda was more effective than was an ,equivalent amount of cottonseed meal. No of'fertilizersproved ,acid .Increase of see.d cotton per acre when cottonseed meal was added: To unfertilized plot--------------------------104 lbs. To acid phosphate plot------------------------44 lbs. lbs. To kainit plot-------------------------------20 To acid phosphate and kainit plot--------------32 lbs. Average increase with cottonseed meal _--24 lbs. -increase of seed cotton per acre when acid phosphate was added: To unfertilized plot -------------------------- 1lbs. To cottonseed meal plot----------------------12 To kainit plot --------------------------__ _-18 To cottonseed meal and kainit -plot----------Average increase with acid phosphate-------25 -6 lbs. lbs. lbs. lbs. Increase of To seed cotton per acre when kainit was meal plot---------------------- To unfertilized plot--------------174 cottonseed added: _ 50 lbs. 32 lbs.44 lbs. lbs. To acid phosphate plot----------------------To meal and acid phosphate plot with kainit---------75 lbs. Increase of see~d cotton per acre from use of different quantities of To use of 200 pounds kainit-------------------- cottonseed Average increase kainit: 44 lbs. _ To use of 100 pounds kainit------------------- 60 lbs. Increase from use of. nitrate of soda- ----------------- 40 lbs. 224 Experiments in Pike and Barbour Counties TROY 1914 o EUFAULA 1915 O O O KIND OF RoFERTILIZER N 7 N p +-4 aa) __ __ _ __ _ - 0) 1 2 3 4 Lbs. .Lbs. 200' Cotton seed meal -240 Acid phosphate..... No fertilizer-___ 200 Kainit----------- 472 504 368 552 -- Lbs. 104 136 174 $ -160 0.71 1.31 2.43 10 1+2 Lbs. 328 192 216 Lbs. $ 168 4.39 56 0.78 36 -0.68 5 6 7 200 Cotton seed meal 240 Acid phosphate.-. 200 Cotton seed meal 200 Kainit__-______No fertilizer-_____ _ 480 552 408 92 154 -1.01 -- 432 284 7.24 240 9 10 11 200 Kainit phosphate6 144 144 320 448 160 --- 200 Cotton seed meal 240 Acid phosphate 200 Kainit - ----200 Cotton seed meal 240 Acid phosphate-100 Kainit- - - 568 528 416 1Acid 1--68 136 -3.09 168 292 4 0.45 7.04 32 -4.68 12 No fertilizer 240 Acid phosphate--. 100 Kainit ___100 Nitrate of soda - -----376 480 14 098 - .9 -30 .2 80 BARBOUR COUNTY, 2 MILES NORTH OF EUFAULA L. B. GREENE-1915. Gray sandy soil, with yellow sandy subsoil. The land on which this experiment was conducted had been in cultivation fifty years or more. Cotton had been the preceding crop for many years. As shown by the yields of the check plots the land was very poor. The largest profit from fertilizers, $8.27. per acre, also the largest increase, 320 pounds of seed cotton peracre, were secured on Plot 12 which .was fertilized with the following : 100 pounds 240 pounds acid phosphate per acre 100 pounds kainit per acre. The next largest profit, $7.24 per acre, and an ixcrease of 284 pounds of seed cotton per acre were secured from Plot 6, fertilized with nitrate of soda per acre 225 200 pounds cottonseed meal per acre 200 pounds kainit per acre. The average increase in seed cotton'per acre due tocottonseed meal was 101 pounds; to acid phosphate, only 13 pounds per acre; and' to kainit, 97 pounds, per acre. Nitrate of soda made a better yield than an equivalent amount of cottonseed meal by 28 pounds of seed cotton per acre. Increase of seed cotton per acre when cottonseed meal was added: lbs. To unfertilized plot--------------------------168 lbs. To acid phosphate plot----------------------40 To kainit plot- -----------------------------248 lbs. lbs. To acid phosphate and kainit plot Average increase with cottonseed meal101 lbs. increase of seed cotton per acre when acid phosphate was added: To unfertilized plot _________-------56 lbs. lbs.. To cottonseed meal plot----------------------72 __-------------184 lbs. To kainit plot __-_____------To cottonseed meal and kainit plot-----------116 lbs. Average increase with acid phosphate-------13 lbs. Increase of seed cotton per acre when kainit was lbs. To unfertilized plot---------------------------36 lbs._ To cottonseed meal plot-116 lbs.. To acid phosphate plot-164 72 lbs. To cottonseed meal and acid phosphate plot lbs. Average increase with kainit---------------97 Increase of seed cotton per acre from use different quantities of kainit: lb& To use of 200 pounds kainit--------------------72 -52 added: of To use of 100 pounds kainit------------------- 196 lbs.. DALE COUNTY, 2 / MILES NORTHEAST OF OZARK A. L. CARR-1915. Light colored sandy soil, with yellowish stiffer sandysubsoil. The land on which this experiment was conductedhad been cleared five years. Corn grew on the soil in 1915, and cotton, the two preceding years. The experiment was planted rather, late for this section (May 7.) This late planting may have affected the yields of thedifferent plots. The largest profit received, $4.25 per acre,. was secured on Plot 4, which received kainit alone. However, Plot 5, receiving 200 pounds cottonseed meal and 240 pounds acid phosphate; and Plot 6, fertilized with_ 226 200 pounds cottonseed meal and 200 pounds kainit, each made a larger increase, than the plot, alone, althoughr the profit was smaller. The average increase attributable.to the application of 200 pounds cottonseed meal per acre was 20 pounds pounds seed cotton; to 240 pounds acid phosphate, seed cotton peracre; while the average increase due to the application of 200.pounds kainit was 90 pounds seed cotton per acre. Cottonseed meal and nitrate of soda were about equally effective when applied in complete fertilizers. receivingkainit 14 Increase of seed cotton per acre when cottonseed was added: To unfertilized plot. -------------------------88 lbs. To acid phosphate plot----------------------152 lbs. To kainit plot--------------------------------8 lbs. To acid phosphate and kainit plot---------------8 lbs. Average increase with cottonseed meal-------20 lbs. Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot----------------------------0 To cottonseed meal plot--------------------To kainit plot meal ------------------------------- To cottonseed meal and kainit plot Average increase with acid phosphate -------Increase of seed cotton per acre when kainit ----------- -92 -92 240 lbs. lbs. lbs. lbs. To unfertilized plot--------------148 To cottonseed meal plot------------244 To acid phosphate plot---------------------- was added: lbs. lbs. 14 lbs. To cottonseed meal and acid phosphate plot -_- Average increase with kainit---------------Increase from use of nitrat.e of soda -----__ ------ -88 56 lbs. lbs. 90 lbs. Increase from use of cottonseed meal in complete fertilizer-----------------------------_------8 Nitrate of soda better than cottonseed meal by-- 16 lbs. lbs. 8 lbs. 227 Experiments in Dale County OZARK 1915 00 ] ~ 0 (U OZARK 1914 ° 0 KIND OF 0 N N FERTILIZER as 2'0 H a 1 2 3 4 6 7 5 200 Kainit-__ - -5 No fertilizer 8 240 Aciphopae_ Lbs. 200 Cotton seed meal 240 Acid phosphate... No fertilizer.-'---'--200, Kainit___________ 200 Cotton secd meal . 240 Acid phosphate-200 Cotton seed m eal Lbs. lbs. $ 88 -88 -6.87 176 0-1.68 176 336 148 4.25 352 152 2.01 368 156 - Lbs. 280 344 144 176 Lbs. 136 200 40 $ 0.01 2.72 0.52 544 288 416 4.47 1.60 168,-0.70 180 312 0.88 0.78. 224 304 336 56 64 112-1.48 304 448 200 Cotton seed meal 9240 200 Acid phosp hate' Kainit No - -4.12 200 10 11 Cotton seed J--meal) 352 320 384 64 -2.99 240 Acid phosphate- 56 -3.35 512 160 224 364 fertilizer---- 2.6310Kit_=-3.97 240 12 100 Acid phosphate- Kainit S100 Nitrate of soda- ---- 64 DALE COUNTY, 34 MILE SOUTH OF OZARK. J. W. BYRD -1914. Gray sandy soil,, with ,stiffer subsoil. This, old upland field had been in cultivation. for 50 or more years. Some damage was done by cotton wilt, but Mr. Byrd reported that about the same number of. stalks were killed on each plot. The largest increase, 364 pounds of seed cotton per acre, was afforded by Plot 10, fertilized with a complete fertilizer in 'which the kainit was reduced to, 100 pounds. per acre. The increase attributable to cottonseed meal was 153 pounds of seed cotton per acre; to acid phosw, phate, 191 pounds; while with kainit there was a decrease in the yield. Cottonseed- meal wvas 'superior to nitrate of soda. average 228 A similar experiment to this one was conducted by Mr. Byrd in 1911, 1912 and 1913. The average increases due to cottonseed meal, to acid phosphate and to kainit in four different combinations, each year, are -shown below: 1911 200 pounds cottonseed meal---------222 240 pounds acid phosphate 141 200 pounds kainit---------254 200 pounds cottonseed meal better than 100 pounds of nitrate of soda by-______-_______ 41 1912 280 148 180 1913 1914 Av. 95 105 141 153 188 146 116 -13 191 first in importance, phosphate second, and kainit a close third. On the whole, cottonseed meal has been 32 111 300 66 -increase of added: To To To To .Increase seed cotton per acre when cottonseed meal was lbs. unfertilized plot-136 acid phosphate plot-----------------------216 lbs. lbs. kainit plot-------------------------------128 lbs. acid phosphate and kainit plot-------------132 153 lbs. Average increase with cottonseed meal of seed cotton per acre when acid phosphate added: lbs. To unfertilized plot--------------------------200 lbs. To cottonseed meal plot---------------------280 140 lbs. To kainit plot _______________-----------To cottonseed meal and kainit plot-------------144 lbs. Average increase with acid phosphate-------191.lbs. when kainit was was Increase of seed cotton per acre To acid phosphate plot -20 lbs.. - 104 lbs. To cottonseed meal and acid phosphate plot Average increase with kainit---------------- 13 lbs. -HENRY COUNTY, 3/4 MILE SOUTH OF HEADLAND. ------------ - To unfertilized plot--------------------------To cottonseed meal plot------------32 added: lbs. 40 lbs. M. A. CREEL-1916. Gray sandy soil, with few gravel in it, with stiffer subsoil. In 1915, cotton was grown on this land, corn in 1914 and corn in 1913. It had been cleared about eighteen years. All plots in "the test were thinned to the same number of stalks on each. Although the excessive rains of this year were followed by heavy infestation of boll weevils in this section, a profit of $14.11 per acre was secured on .Plot 5 when an application of 200 pounds cottonseed meal and 229 240 pounds acid phosphate per acre was used. In this wet year when boll weevils were present in great numbers after the first week of July, an average increase of 79 pounds seed cotton was secured when cottonseed meal was used at the rate of 200 pounds per acre before planting. The average increase due to 240 pounds acid phosphate was 16 pounds seed cotton per acre; while with kainit there was a loss of 45 pounds seed cotton per acre when 200 pounds of this fertilizer was used. Nitrate of soda applied June 15 was slightly less effective when used in a complete fertilizer than was an equivalent amount of cottonseed meal. Increase of seed cotton per acre when cottonseed meal was added: 200 lbs. To unfertilized plot 120 lbs. To acid phosphate plot 32 lbs. To kainit plot To acid phosphate and kainit plot -38 lbs. Average increase with cottonseed meal 79 lbs. Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot -------------136 lbs. To cottonseed meal plot_-------56 lbs. To kainit plot---30 lbs. To cottonseed meal and kainit plot- -100 lbs. Average increase with acid phosphate 16 lbs. increase of seed cotton per acre when kainit was added: To unfertilized plot -------------------------- 120 lbs. To cottonseed meal plot 48 lbs. -_ 46 lbs. To acid phosphate plot __---------To cottonseed meal and acid phosphate plot -__204 lbs. Average increase with kainit --------------- 45 lbs. ------ ------ 230 Experiments in Henry and Houston Counties HEADLAND HEADLAND 1916 0 0. 0O 0 1915 0 KIND. OF " O'O° N Z +1 FERNTILIZER 1 2 3 Lbs. 200 Cotton seed meal 240 Acid phosphate No fertilizer Lbs. 496 432 - Lbs. $ 200.11.90 8.37 136 12-4.76 256 4 5 Kainit_ o200 200 Cotton seed meal 61 7 8 240 Acid phosphate-200 Cotton seed meal 200 IKainit__________ t -- 296 424 568 Lbs. Lbs. $ 1152 -48 -5.11 48 0.43 1248 10000 1088 1312 -6.43 -96 144 14.11 1.66 627 472 328 152 9, 10 11 240 200 200 240 2.00 No fertilizer-____ Acid phosphate- _ Kainit___-Cotton seed meal Acid, phosphate Kainit-- -- -90 -9.17 52 '15.60 134 2.28 - 1136 408 1344 1408 1056 1040 1360 232 ~ 360 432 288 408 320 -8 7.14 -6.16 7 12 200.- Cotton seed meal 240Acid -___ 100 Kainit No fertilizer 240 Acid phosphate-- phosphate-_ -_-_= S 100 100- Kai-nit 120 -3.61 320 8.27 Nitrate of soda HOUSTON. COUNTY, 31/2 MILES SOUTH OF HEADLAND. D. C. JARVIS 1915. Yellowish-gray sandy loam, with stiffer yellow subsoil. The land on which. this experiment was con ducted had been in cultivation only -six years, and had grown cotton during the past three years. Due to a hard storm which came just after the plants were coming. up, it was necessary to plant this cotton over. The second planting came rather late for this section (May 10.) The largest profit, $8.27 per acre, was secured when a complete fertilizer containing 100 pounds nitrate of soda, 240 pounds acid phosphate and 100 pounds kain-it was used on Plot 12, although an equal seed cotton was secured when a higher priced increaserin combi- 231 nation of fertilizer containing 200 pounds cottonseed meal, 240 pounds acid phosphate and 200 pounds kainit was used on Plot 9. The average increase due to 200 pounds cottonseed meal per acre on this experiment was 46 pounds seed cotton per acre; to 240 pounds acid phosphate, 234 pounds seed cotton per acre; and to 200 pounds kainit, 66 pounds seed cotton per acre. The figures from Plots 10, 11 and 12 suggest that there may have been some undiscovered conditions depressing the yield of one or more of these plots and prevent the drawing of any conclusion regarding the relative values of cottonseed meal and nitrate of soda and the relative effects of different amounts of kainit Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot To acid pohsphate plot To kainit plot To acid phosphate and kainit plot - -48 -- - Average increase with cottonseed meal Increase of seed cotton per acre when acid phosphate was added: To unfertilized plot To cottonseed meal plot To kainit plot To cottonseed meal and kainit plot Average increase with acid phosphate 48 192 328 368 234 lbs. lbs. lbs. lbs. lbs. 96 48 88 46 lbs. lbs. lbs. lbs. lbs. Increase of seed cotton per acre when kainit was added: To unfertilized plot --------96 lbs. To cottonseed meal plot 0 lbs. To acid phosphate plot 184 lbs. To cottonseed meal and acid plhosphate plot 176 lbs. Average increase with kainit 66 lbs. Increase of seed cotton per acre from use of different quanti- - To use of 200 pounds kainit ----------------- 176 lbs. To use of 100 pounds kainit -152 lbs. Increase from use of cottonseed meal in complete fertilizer 88 lbs. Increase from use of nitrate of soda ... ---416 lbs. Nitrate of soda better than cottonseed meal by_ 328 lbs. HENRY COUNTY, 11/2 MILES NORTHWEST OF ties of kainit: HEADLAND. C. F. WILKERSON 1915. Reddish sandy lorm, with stiffer red subsoil. Corn with velvet beans, was grown on this land in 1914; cotton preceded these crops for two years. The 232 land had been cleared of the original forest growth approximately thirty years. In this dry year no. fertilizer or combination of fertilizers produced a profit on this cotton planted May 14, although increases of 124 and 112 pounds seed cotton per acre were secured on Plots 9 and 12, respectively. Plot 9 received, per acre, 200 pounds cottonseed meal. 240 pounds acid phosphate and 200 pounds kainit; while Plot 12 received 240 pounds acid phosphate, 100 pounds kiainit and 100 pounds nitrate of soda, (nitrate applied late-about July 1.) On this level uniform land cottonseed meal, acid phosphate and kainit were, on the average, about equally effective. Increase of seed cotton per acre when cottonseed meal was added: 40 lbs. ----To unfertilized plot 32 lbs. To acid phosphate plot 48 lbs. _- __To kainit plot 62 lbs. To acid phosphate and kainit plot 46 lbs. Average increase with cottonseed meal Increase of seed cotton per acre when acid phosphate was added: 16 lbs. -To unfertilized plot lbs. -8 To cottonseed meal plot 58 lbs. To kainit plot 72 lbs. To cottonsced meal and k init plot _ _ _ 39 lbs. Average increase with acid phosphate Increase of seed cotton per acre when kainit was added: 4 lbs. To unfertilized plot lbs. -12 To cottonseed meal plot 46 lbs. To acid phosphate plot__ 76 Ibs. To cottonseed meal and acid phosphate plot 35 lbs. -----Average increase with kainit-Increase of seed cotton per acre from use of different quantities of kainit: 76 lbs. --To use of 200 pounds kainit 50 lbs. To use of 100 pounds kainit Increase from use of cottonseed meal in complete ..- lbs. 62 .... fertilizer 76 lbs. Increase from use of nitrate of soda 14 lbs. Nitrate of soda better than cottonseed meal by - _ _ 233 Experiments in Henry and Sumter Counties HEADLAND CUBA* 1915 1918 0 ~0 0.N0 a KIND OF N 0 Z { FERTILIZER Lbs. Lbs. $ Lbs. 368 40 -1.24 936 344 16 -0.98 848 328-----------816 328 4'-2.08 896 368 483 368 .52 -2.97 904 376 1 440 41 41 320 432 1 2 3 4 5 6 7 8 9 10 11 12 Lbs. 200 Cotton seed meal 240 Acid phosphate---. No fertilizer----200 Kainit___ 200 Cotton seed meal 240 Acid phosphate200 Cotton seed meal } S200 Kainit--------240 Acid phosphate-ofriie __ S200 Kainit ------- Lbs. $ 120 7.70 32 1.00 110 4.84 178 150 6.82 6.72 10.68 .3 .3 62 -1.21 124 -1.48 98-.0 98-.0 _:_ 112 -0.88 872 9 984 52 52 800 1008 - 200 240 200 200 240 100 Cotton seed meal Acid phosphate _ Kainit_------) Cotton see dmeal Acid phosphate Kainit_-___- 236 78 78 208 No fertilizer ___ 240 Acid phosphate--) 100 100 Kainit-----Nitrate of soda._. 11.73 *120 aspounds alkalipotash. used instead salts source of SUMTER COUNTY, W. H. / of 200 pounds of kainit MILE NORTH OF CUBA. STEPHENs-1918. Gray fine sandy loam, with fine yellow sandy subsoil. The land on which this experiment was located was mapped by the United States Bureau of Soils as Norfolk Fine Sandy Loam. It had been in cultivation many years. No legume hatd recently grown where the experiment was 120. pounds per acre were used instead of ,200 pounds kainit. The largest profit, $11.73_ per acre,' and an increase of 208 pounds seed cotton per acre were secured from Plot 12, fertilized as 240 pounds acid phosphate located. Alkali salts at the rate of follows: 234 60 pounds alkali salts (equivalent to 100 pounds kainit)... 100 pounds nitrate of soda. The largest increase in seed cotton per acre, 236 pounds, obtained at a profit of $10.68 per acre was made on Plot 9 where the following application was used: 200 pounds cottonseed meal 240 pounds acid phosphate 120 pounds alkali salts (equivalent to 200 pounds kainit). On this soil in 1918 it appears that potash was badly needed. The average increase due to potash in the form of alkali salts was 114 pounds seed cotton per acre; to cottonseed meal, 78 pounds; while with acid phosphate the average increase was only 20 pounds. Potash when applied in the form of alkali salts at the rate of 200 pounds per acre gave 58 more pounds seed cotton per acre than did the same fertilizer applied at one-half the usual rate. Nitrate of soda applied when the plants were about six inches tall was more effective by 30 pounds seed cotton per acre than cottonseed meal, applied before planting. Increase of seed cotton per acre when cottonseed meal was added: To unfertilized plot------__120 lbs. To acid phosphate plot 36 ----68 To kainit plot ---- _-----86 To acid phosphate and kainit plot _----Average increase with cottonseed meal __ 78 lbs. lbs. lbs. lbs. Increase of seed cotton per acre when acid phosphate was added: 32 lbs. To unfertilized plot -------------------------To cottonseed meal plot----------------------52 lbs. To kainit plot-_-----------40 lbs. To cottonseed meal and kainit plotAverage increase with acid phosphate ----- 58 lbs. 20 lbs. 110 lbs. 58 lbs. 118 lbs. Increase of seed cotton per acre when kainit was added: To unfertilized plot ------------------------------To cottonseed meal plot--------To acid phosphate plot--- To cottonseed meal and acid phosphate plot__ Average increase with kainit -------------Increase of ties of To use To use 168 lbs. 114 lbhs. seed cotton per acre from use of different quantikainit: _ 168 lbs. of 200 pounds kainit__ 110 lbs. of 100 pounds kainit--------------- --- 235 Increase from use of cottonseed meal in complete fertilizer------------------------------------86 lbs. 116 lbs. Increase from use of nitrate of soda 30 lbs. Nitrate of soda better than cottonseed meal by -------------- IN CONCLUSIVE EXPERIMENTS. In SUMTER COUNTY, an experiment conducted by W. H. Stephens, one-half mile North of Cuba in 1914, proved inconclusive because of lack of uniformity of the soil as shown by the check plots. (See page 236.) In GREENE COUNTY, an experiment conducted by J. A. Dees, 6 miles west of Eutaw in 1914, proved inconclusive because of poor stand. In 1915, a similar experiment conducted by Mr. Dees proved inconclusive. (See page 236.) In CHOCTAW COUNTY, in 1914, an experiment conducted by J. L. Covington, 6 miles South of Lisman proved inconclusive. (See page 236.) Also see Alabama Station Bulletin, No. 174-page 165, for 1913 results on same plots.) In MARENGO COUNTY, in 1918, an experiment conducted by W. C. Harrison on a reddish fine sandy soil near G.allion proved inconclusive because the area had been fertilized with barnyard manure in recent years. (See page 236.) In DALLAS COUNTY, in 1914, an experiment conducted by C. Kirkpatrick at Cahaba, on Norfolk fine sandy loam soil, proved inconclusive because of lack of uniformity in soil as indicated by the check plots. (See page 236.) In AUTAUGA COUNTY, an experiment which was made by W. G. Pickett, near Autaugaville, in 1915, proved inconclusive because the fertilizers were not properly applied. (See page 236.) In AUTAUGA COUNTY, in 1915, W. A. Wadsworth conducted an experiment near Prattville, on gray fine sandy loam with brownish red fine sandy subsoil. The results were inconclusive. (See page 236.) ________JCUBA _________ 19141 0o Q+ 0 E UTAW 1914 EUTAW 1915 I 0 0 LISMAN 1914 0 ) GALLION* 1918 0 0 AUTAUGAJ CAHABA I VILLE, 1915 jI PRATTVLL 1914 1915 0 00 0 0 0 0 yQ 0 N0 a) 0 p S FERTILIZER KINDOFb __ _ _ _0_ _ _Q__ i 0 C ____ _O__ i_ r), . 4.;*5 0__ at (1) 6-o d) - a0W d) 6,0 _ __ -- Lbs" 1 2 200 Cotton seed. meal 240 Acid phosphate_ _ Lb-s. 1032 2 _ (1)-~ ~ Lbs._ "v - 0 0.,-0 a) r 4i "0 ' CJ __ 00 )-. * C)-" _w_ __0 -4 __ ~- O _0_ __ " C1"