Evaluations of Corn Hybrids in Alabama, 2007 Agronomy and Soils Departmental Series No. 287 Alabama Agricultural Experiment Station Richard Guthrie, Director Auburn University, Auburn, Alabama, December 2007 Printed in cooperation with the Alabama Cooperative Extension System (Alabama A&M University and Auburn University) Appreciation is expressed to the following supervisory personnel of the outlying units whose quality work makes this a reliable source of information for farmers in their areas. Chet Norris, Tennessee Valley Research and Extension Center; Tony Dawkins, Sand Mountain Research and Extension Center; Don Moore, Prattville Research Unit; Bobby Durbin and Steve Nightengale, E.V. Smith Research Center; Randy Akridge, Brewton Research Unit; Larry Wells and Brian Gamble, Wiregrass Research and Extension Center; Ronnie McDaniel and Malcomb Pegues, Gulf Coast Research and Extension Center. ACKNOWLEDGMENTS Information contained herein is available to all persons regardless of race, color, sex, or national origin. Issued in furtherarnce of Cooperative Extension work in agriculture and home economic, Acts of May 8, and June 30, 1914, and other related acts, in cooperation with the U.S. department of Agriculture. The Alabama Cooperative Extension System (Alabama A&M University and Auburn University) offers educational programs, materials, and equal opportunity employment to all people without regard to race, color, national origin, religion, sex, age, veteran status, or disbility TABLE OF CONTENTS Introduction ...................................................................................................................................................4 Table 1. Locations and Cultural Practices for the 2007 Corn Hybrid Tests ...........................................6 NORTHERN ALABAMA Table 2. Two- and Three-year Yield and Lodging Averages for Corn in Northern Alabama, 2005-2007 ...................................................................................................................................7 Table 3. 2007 Yield of Corn Hybrids by Location and Regional Averages of Hybrid Characteristics in Northern Alabama ..................................................................................................................8 Table 4. Irrigated Corn Hybrid Performance and Characteristics, Belle Mina, Alabama, 2007 .............9 CENTRAL ALABAMA Table 5. One, Two- and Three-year Yield and Lodging Averages for Corn at Prattville in Central Alabama, 2005-2007 ...................................................................................................10 Table 6. One, Two- and Three-year Yield and Lodging Averages for the No-Till Early Corn Hybrid Test at Shorter in Central Alabama, 2005-2007 ..........................................................11 SOUTH ALABAMA Table 7. Two- and Three-year Yield and Lodging Averages for Corn in Southern Alabama, 2005-2007 .................................................................................................................................12 Table 8. Yield of Corn Hybrids by Location and Regional Averages of Hybrid Characteristics in Southern Alabama, 2007 ......................................................................................................13 Table 9. Irrigated Corn Hybrid Performance and Characteristics, Headland, Alabama, 2005-2007 ....14 RAINFALL, SOIL TYPES AND SEED SOURCES Table 10. Growing Season Rainfall, 2005-2007 ......................................................................................15 Table 11. Soil Types for Corn Trials, 2007 ..............................................................................................16 Sources of 2007 Corn Hybrid Test Seed ................................................................................................16 4 ALABAMA AGRICULTURAL EXPERIMENT STATION EVALUATION OF CORN HYBRIDS IN ALABAMA K.M. Glass and E. van Santen Agricultural Program Associate. and Professor, Department of Agronomy and Soils, Auburn University, AL 36849 INTRODUCTION Selected corn hybrids are evaluated annually by the Alabama Agricultural Experiment Station as a service to producers and industry. These tests are conducted throughout the state in an attempt to determine effects of different climatic factors and soil types on yield. There are several types of tests in the program. The Preliminary Hybrid Tests are conducted at one location in each of the northern, central and southern regions of the State. These tests include experimental and newly released hybrids. If a hybrid is outstanding in the preliminary test it is entered in the Regular Corn Hybrid Test the following year. The Regular Corn Hybrid Test is conducted at two locations in the northern region, one location in the central region and three locations in the southern region. Early yellow corn hybrids are tested at one location in each region. In addition, a regular corn hybrid test is irrigated at Belle Mina and Headland. Locations and cultural practices for all tests are given in Table 1. EXPERIMENTAL PROCEDURES All tests are laid out in a randomized complete block design with four replicate plots for each variety at each location. Rows are 30 to 36 inches apart, depending on location. Two-row plots are used, and both rows are harvested. Plots are 20 to 30 feet long, depending on location. The target plant population for the tests is 25,000 plants per acre with a seeding rate of 28,000 seeds per acre. The irrigated tests at Belle Mina, Tallassee and Headland are seeded to achieve 30,000 plants per acre, but are thinned to 25,000 plants per acre. Grain yields are adjusted to 15.5 percent moisture and converted to bushels (56 lbs) per acre. Stalks broken or leaning more than 45 degrees are considered lodged. The mid-silk data show the number of days from planting until approximately half the plants in the plots are showing silks. The Regular Corn Hybrid tests also are examined for disease incidence at selected locations each year. When virus or other disease symptoms indicate crop damage, disease ratings are compiled and published in this report. STATISTICAL ANALYSIS All test were conducted in randomized complete block designs and analyzed accordingly. It is important to keep in mind that genotype x environment interaction is common in multi-year and multi-location mean. This interaction usually is an indication that the relative rankings of varieties change from one environment to the next. Thus, one cannot draw widespread conclusions if the interaction is significant. INTERPRETATION OF DATA In replicated experiments such as those reported here, yields from each of the four replicate plots of a particular variety at a given location will be slightly different, because of inherent differences in productivity among those plots. These differences in yield among replicate plots are known as random variation. Given this situation, it is clearly necessary to have a method to determine whether differences among hybrids are “true” or “real” differences, or whether they are due to random variation. To do this a statistical analysis was conducted to determine a “least significant difference” (LSD) by comparing the differences among varieties with random variation. If the difference in yield between two hybrids is larger than the LSD, then the difference is probably real, but if the difference is less than the LSD, it may not be real. If the difference between two hybrids is less than, but close to the LSD, then there is still a chance that it is real, but if it is considerably smaller than the LSD, then it is probably not real and mainly due to random variation. EVALUATIONS OF CORN HYBRIDS IN ALABAMA 2007 5 With this in mind, it is very important to study differences in hybrid yields in relation to the LSD which is provided at the bottom of the table for each of the current year yield columns at each location. Clearly, LSD’s vary from one location to another. This is because random variation varies among locations and from year to year. The coefficient of variation (CV) is a reflection of random variation, and is reported below the LSD values in the tables. If the CV is low, a precise or reliable test is indicated. Ideally, the CV should be below 10 percent, but CV’s of 10 to 20 percent are acceptable. Values for the CV above 20 percent indicate a rather unreliable test, which may have been caused by factors such as disease variation among replicates, etc. In comparing yield potential of two hybrids it is important to consider a wide range of results. Do not focus on results from only one year at one location. Two- and three-year average yields are provided by location and region. These are more useful guides than yields from only one year. However, other factors may deserve consideration. For example, differences between the highest and the lowest yield of a hybrid across several locations may be an indication of the stability of its yield under variable conditions, or what is the “risk level” of the variety. Differences in yield of hybrids among locations will be a result of the combined effects of differences among locations in soil, weather (mainly rainfall), planting date, weed control, and other factors. To assist in estimating which factors most likely had the greatest effect on yield differences among locations, planting dates and cultural practices (Table 1), rainfall records (Table 10) and soil types (Table 11) are provided. This information also serves as a guide for assessing conditions to which results may be extrapolated. 6 ALABAMA AGRICULTURAL EXPERIMENT STATION TABLE 1. LOCATIONS AND CULTURAL PRACTICES FOR THE 2007 CORN HYBRID TRIALS Planting Location NORTHERN ALABAMA Tennessee Valley Res. and Ext. Ctr. (Belle Mina) Regular test (non-irrigated) Regular test (irrigated) Regular test Early test Preliminary test CENTRAL ALABAMA E.V. Smith Research Center (Shorter) No-Till Early corn test Early test Plant Breeding Unit (Tallassee) Preliminary test No trial April 5 SOUTHERN ALABAMA Brewton Experiment Field (Brewton) April 9 Wiregrass Res. and Ext. Ctr. (Headland) Regular test (non-irrigated) Regular test (irrigated) Regular test Early test Preliminary test † Nitrogen Rate† lbs/ac Plant pop. seeds/ac Date harvested Herbicides used date April 2 April 2 April 17 No trial No trial 175 200 120 25,000 30,000 25,000 - Not harvested September 6 September 11 - Atrazine/Dual Atrazine/Dual Atrazine/Dual - Sand Mountain Res. and Ext. Ctr. (Crossville) - March 22 No trial 160 120 30,000 25,000 Not harvested August 23 Atrazine/Dual Atrazine/Dual Prattville Experiment Field (Prattville) 120 120 200 140 - 25,000 25,000 30,000 25,000 - September 10 August 9 August 28 August 30 - Atrazine/Dual Atrazine Atrazine Atrazine/Dual - April 6 April 9 March 14 No trial Gulf Coast Res. and Ext. Ctr. (Fairhope) No trial - - Lime, phosphorus, potassium, zinc, and sulfur were applied according to soil test recommendations. EVALUATIONS OF CORN HYBRIDS IN ALABAMA 2007 7 TABLE 2. TWO- AND THREE-YEAR YIELD AND LODGING AVERAGES FOR YELLOW CORN IN NORTHERN ALABAMA, 2005-2007 † The 2007 test at Belle Mina was lost due to prolong drought conditions, hence no multi-year information is reported for Northern Alabama 8 ALABAMA AGRICULTURAL EXPERIMENT STATION TABLE 3. 2007 YIELD OF CORN HYBRIDS BY LOCATION AND REGIONAL AVERAGES OF HYBRID CHARACTERISTICS IN NORTHERN ALABAMA 2007 regional averages Belle CrossHusk Harvest TestMina ville Yield Lodging weight Mid-silk cover moisture ---------- bu/acre ------- % -lb/bu mo-day -- % -- Brand name - hybrid Dekalb DKC 69-71 Dekalb DKC 61-45 (RR2/YGCB) Garst 8295 YG1/RR Garst 8380 IT DynaGro CX 06517 Asgrow RX715 RR2/YGCB Dekalb DKC 63-46 (RR2/YGCB) AgraTech 7696 Dekalb DKC 63-81 (RR2/YGCB) Southern States SS 96013 Southern States SS 842RR2/YGCB Dyna-Gro Cx 04319 Garst 8247 YG1 AgraTech X 41751CRW Southern States SS 791 CL Dyna Gro 58K40 NK Brand N 77-P5 Dekalb DKC 64-27 (RR2) Southern States SS 731 CL DynaGro 58P60 DynaGro CX 06313 Dekalb DKC 61-22 (RR2) NK Brand N 68-B8 Test Average LSD0.10 CV (%) † 149 144 139 138 135 133 127 121 120 116 112 111 111 108 108 108 105 103 101 100 99 90 71 115 25 23 149 144 139 138 135 133 127 121 120 116 112 111 111 108 108 108 105 103 101 100 99 90 71 115 17 23 0.0 0.0 0.0 6.0 0.0 0.0 0.3 2.3 0.0 0.0 10.5 3.8 0.0 0.5 2.8 4.0 0.5 1.8 4.0 0.5 0.0 2.8 0.0 1.7 1.0 91.6 56.7 56.0 57.9 55.3 56.0 56.5 56.8 55.7 54.9 56.7 55.4 53.6 55.2 54.3 55.1 56.0 55.2 55.0 56.3 54.4 55.2 55.9 55.5 7-3 6-27 6-29 6-29 7-6 6-27 6-27 7-1 6-27 6-30 7-3 7-2 6-30 6-28 7-3 7-3 6-28 6-28 6-30 7-1 6-27 6-28 6-27 2.5 4.0 2.3 2.5 2.0 3.8 4.0 3.5 3.5 3.0 2.3 2.8 2.0 3.3 2.5 2.5 2.3 3.0 3.0 3.0 3.8 3.5 3.0 15.3 14.3 15.1 14.0 13.8 13.7 13.7 14.9 13.1 14.9 13.6 13.4 13.8 13.5 14.2 13.6 12.4 14.4 17.3 13.4 13.8 11.8 46.6 † The 2007 test at Belle Mina was lost due to prolong drought conditions. EVALUATIONS OF CORN HYBRIDS IN ALABAMA 2007 9 TABLE 4. IRRIGATED CORN HYBRID PERFORMANCE AND CHARACTERISTICS, BELLE MINA, ALABAMA, 2005-2007 Grain yield Brand name - hybrid Dekalb DKC 61-45 (RR2/YGCB) Dyna Gro 58K40 Dekalb DKC 63-81 (RR2/YGCB) Dyna-Gro Cx 04319 Dekalb DKC 69-71 Garst 8247 YG1 Garst 8380 IT Garst 8295 YG1/RR Southern States SS 842RR2/YGCB Southern States SS 96013 Dekalb DKC 64-27 (RR2) Dekalb DKC 61-22 (RR2) AgraTech X 41751CRW DynaGro 58P60 DynaGro CX 06517 Asgrow RX715 RR2/YGCB DynaGro CX 06313 Dekalb DKC 63-46 (RR2/YGCB) NK Brand N 77-P5 Southern States SS 791 CL Southern States SS 731 CL AgraTech 7696 NK Brand N 68-B8 Test Average LSD0.10 CV (%) 8 9 11 9 Lodging Test- Mid- Husk Harvest 3-yr 2-yr 2007 3-yr 2-yr 2007 weight silk cover moisture ---- bu/acre ----------- % ------lb/bu mo-day -- % -- 195 190 200 186 183 197 184 177 189 178 179 207 173 167 187 216 229 199 220 196 219 188 201 183 195 183 187 179 198 177 193 207 205 205 199 197 196 195 193 189 180 183 186 199 12 7 2.6 8.3 0.8 1.9 1.0 1.3 0.8 0.8 0.0 0.5 1.0 1.3 1.8 0.0 0.8 1.8 1.3 0.3 0.8 1.5 0.0 0.5 0.3 0.8 1.0 0.8 1.0 58 60 60 56 60 58 56 55 55 59 58 56 56 59 59 57 55 58 55 60 58 58 54 6-17 6-25 6-18 6-22 6-25 6-20 6-17 6-19 6-20 6-22 6-15 6-17 6-18 6-21 6-26 6-17 6-16 6-16 6-18 6-21 6-18 6-21 6-18 3.3 1.8 2.8 3.0 2.0 2.0 1.8 1.0 2.3 2.3 3.5 2.3 2.3 2.0 3.0 2.3 2.3 3.8 1.8 2.5 2.8 2.3 2.0 11.8 15.8 13.2 13.9 15.9 13.1 11.5 13.8 13.5 14.2 12.6 12.1 11.8 14.7 14.6 12.7 12.2 12.1 12.9 14.4 14.2 12.5 10.7 11.8 2.5 14.2 2.0 10.5 0.1 2.4 2.3 1.5 1.9 0.0 2.4 4.9 2.8 9.5 3.2 1.9 1.1 0.8 0.9 † The 2007 irrigated test received 12.3 inches of water. 10 ALABAMA AGRICULTURAL EXPERIMENT STATION TABLE 5. ONE, TWO- AND THREE-YEAR YIELD AND LODGING AVERAGES FOR YELLOW CORN AT PRATTVILLE IN CENTRAL ALABAMA, 2005-2007 Grain yield Brand name - hybrid Dekalb DKC 69-71 Southern States SS 842RR2/YGCB Garst 8380 IT Dekalb DKC 67-23 (RR2/YGCB) Garst 8247 YG1 Garst 8295 YG1/RR Dekalb DKC 66-23 (RR2/YGCB) Southern States SS 96013 Dekalb DKC 65-47 (RR2) NK Brand N 77-P5 Southern States SS 731 CL Dekalb DKC 64-27 (RR2) Southern States SS 791 CL Dekalb DKC 67-87 (RR2/YGCB) Dekalb DKC 69-43 (RR2) Dekalb DKC 61-73 (RR2/YGCB) Dekalb DKC 63-46 (RR2/YGCB) NK Brand N 68-B8 Test Average LSD0.10 CV (%) 54 4 12 22 4 30 1.6 0.8 Lodging Test- Mid- Husk Harvest 3-yr 2-yr 2007 3-yr 2-yr 2007 weight silk cover moisture ---- bu/acre ----------- % ------lb/bu mo-day -- % -- 56 53 17 17 27 26 25 22 20 20 † 2.1 1.0 0.8 1.0 0.8 1.3 0.5 0.8 0.0 4.5 6.3 8.9 3.9 7.5 3.0 9.1 11.8 11.4 10.5 6.9 6.1 5.2 5.2 4.8 2.7 2.1 6.7 54 50 55 55 53 57 54 58 59 56 58 57 56 54 59 57 2.3 1.8 2.3 3.0 2.0 1.8 4.0 3.5 3.0 2.8 1.5 2.8 1.5 2.8 2.3 3.3 2.8 3.3 7.0 6.5 7.3 7.5 7.0 7.3 7.5 7.5 6.5 6.8 5.8 7.5 6.0 6.0 6.9 7.0 7.5 8.1 1.3 11.0 † The 2007 trial was lost due to prolonged drought. EVALUATIONS OF CORN HYBRIDS IN ALABAMA 2007 11 TABLE 6. ONE, TWO- AND THREE-YEAR YIELD AND LODGING AVERAGES FOR THE NO-TILL EARLY CORN TEST AT SHORTER IN CENTRAL ALABAMA, 2005-2007. † The 2007 test at Shorter was lost due to prolong drought conditions 12 ALABAMA AGRICULTURAL EXPERIMENT STATION TABLE 7. TWO- AND THREE-YEAR YIELD AND LODGING AVERAGES FOR YELLOW CORN IN SOUTHERN ALABAMA, 2005-2007† Grain yield Brand name - hybrid Dyna Gro 58K40 Dyna-Gro Cx 04319 Dekalb DKC 69-71 Croplan Genetics 851RR2/BT Croplan Genetics 751 RR2/Bt Croplan Genetics 799 RR2 Southern States SS 96013 Dekalb DKC 67-23 (RR2/YGCB) Dekalb DKC 66-23 (RR2/YGCB) Southern States SS 842RR2/YGCB Test Average LSD0.10 CV (%) † % stalks lodging 3-yr 2.4 5.1 5.0 8.3 . . . . . . . . . 2-yr 2.4 3.9 2.3 6.2 3.7 2.3 2.9 1.8 3.1 5.3 . . . ---------- % ----------- 3-yr 109 104 101 96 . . . . . . 102 7 18 2-yr 116 117 110 99 114 99 96 95 93 92 103 7 14 ---------- bu/acre --------- Data from Headland not included in the 3-yr and 2-yr averages EVALUATIONS OF CORN HYBRIDS IN ALABAMA 2007 13 TABLE 8. 2007 YIELD OF CORN HYBRIDS BY LOCATION AND REGIONAL AVERAGES OF HYBRID CHARACTERISTICS IN SOUTHERN ALABAMA 2007 regional averages Lodg- TestHusk Harvest Fair- Brew- Headhope ton land Yield ing weight Mid-silk cover1 moist. ----------- bu/acre ------------ -- % -lb/bu mo-day -- % -- Brand name - hybrid Dyna-Gro Cx 04319 DynaGro 58P60 Dyna Gro 58K40 Dekalb DKC 69-71 Garst 8247 YG1 Croplan Genetics 751 RR2/Bt DynaGro CX 06517 Croplan Genetics 8702 RH Croplan Genetics 8221 RB AgraTech 897RR Croplan Genetics 8950 RB Croplan Genetics 851RR2/BT Dekalb DKC 69-43 (RR2) NK Brand N 77-P5 Dekalb DKC 67-87 (RR2/YGCB) Southern States SS 96013 AgraTech 797RR Dekalb DKC 67-23 (RR2/YGCB) Croplan Genetics 799 RR2 Southern States SS 842RR2/YGCB Southern States SS 731 CL Dekalb DKC 65-47 (RR2) DynaGro CX 06313 Dekalb DKC 66-23 (RR2/YGCB) Dekalb DKC 61-73 (RR2/YGCB) Dekalb DKC 64-27 (RR2) Southern States SS 791 CL Dekalb DKC 63-46 (RR2/YGCB) Test Average LSD0.10 CV (%) 175 165 152 158 179 168 146 159 136 157 168 135 157 147 164 141 139 158 134 129 124 137 156 143 144 134 148 120 149 18 13 140 128 134 136 97 111 123 106 116 99 76 105 83 90 89 98 91 65 88 89 79 69 52 57 52 58 44 51 90 19 23 † 157 147 143 147 138 139 134 133 126 128 122 120 120 118 126 119 115 111 111 109 102 103 104 100 98 96 96 85 120 9 19 1.3 3.6 1.6 2.9 3.3 3.3 2.5 3.8 4.9 0.1 1.1 6.6 0.0 2.5 0.3 3.3 2.3 1.3 2.9 4.4 3.5 0.3 1.5 3.9 1.9 0.4 3.6 0.3 2.4 1.4 . 53 57 53 51 56 57 54 52 56 52 53 56 55 53 53 56 55 53 52 53 53 56 54 57 52 53 52 54 . . . 6-12 6-12 6-13 6-14 6-12 6-12 6-15 6-13 6-14 6-12 6-13 6-12 6-10 6-12 6-12 6-13 6-15 6-10 6-12 6-12 6-11 6-11 6-10 6-11 6-10 6-10 6-14 6-10 . . . 3 3 2 3 3 2 3 3 3 2 2 3 3 3 3 4 3 4 2 3 3 4 4 3 3 3 3 3 . . . 16.1 17.6 19.8 17.0 15.4 16.5 17.5 15.1 15.4 18.6 15.6 15.4 16.3 15.9 16.4 16.7 20.8 16.4 18.1 17.7 18.2 16.4 13.4 15.0 15.8 14.8 15.7 14.3 . . . † The 2007 test at Headland was lost due to prolong drought conditions 14 ALABAMA AGRICULTURAL EXPERIMENT STATION TABLE 9. IRRIGATED CORN HYBRID PERFORMANCE AND CHARACTERISTICS, HEADLAND, ALABAMA, 2005-2007 Grain yield Brand name - hybrid Dyna Gro 58K40 Dekalb DKC 69-71 Croplan Genetics 851RR2/BT Dyna-Gro Cx 04319 Croplan Genetics 751 RR2/Bt Croplan Genetics 799 RR2 Dekalb DKC 66-23 (RR2/YGCB) Southern States SS 96013 Dekalb DKC 67-23 (RR2/YGCB) Southern States SS 842RR2/YGCB Garst 8247 YG1 DynaGro 58P60 Dekalb DKC 67-87 (RR2/YGCB) Croplan Genetics 8702 RH NK Brand N 77-P5 Southern States SS 731 CL AgraTech 897RR Croplan Genetics 8221 RB AgraTech 797RR Dekalb DKC 65-47 (RR2) DynaGro CX 06517 DynaGro CX 06313 Dekalb DKC 69-43 (RR2) Dekalb DKC 64-27 (RR2) Croplan Genetics 8950 RB Dekalb DKC 61-73 (RR2/YGCB) Dekalb DKC 63-46 (RR2/YGCB) Southern States SS 791 CL Test Average LSD0.10 CV (%) Lodging Test- Mid- Husk Harvest 3-yr 2-yr 2007 3-yr 2-yr 2007 weight silk cover moisture ---- bu/acre --------- % ----lb/bu mo-day -- % -- 174 169 164 159 178 152 159 158 165 142 134 131 139 108 169 166 161 156 151 149 149 148 144 144 137 135 134 130 125 119 106 95 166 167 142 9 13 19 10 12 15 185 175 173 170 178 170 163 157 154 148 4.5 6.1 7.2 6.7 1.0 3.9 6.4 2.6 3.9 5.0 6.9 6.8 7.3 19.5 6.1 2.3 69 6.3 4.0 98 0.0 0.0 0.0 0.3 0.3 0.3 0.0 0.0 0.3 0.8 0.0 0.0 0.0 0.0 1.0 0.0 0.3 0.5 1.3 0.0 0.0 0.0 0.0 0.3 0.0 0.3 0.0 0.0 0.2 0.5 59 59 55 54 56 59 57 58 57 53 59 58 57 58 55 57 59 57 57 56 55 54 60 56 58 53 54 55 6-11 6-11 6-11 6-8 6-11 6-8 6-8 6-11 6-4 6-10 6-8 6-11 6-10 6-11 6-11 6-8 6-8 6-8 6-10 6-11 6-8 6-8 6-11 6-8 6-8 6-4 6-8 6-11 2.0 2.8 2.8 2.5 1.8 2.0 1.5 2.8 3.0 2.5 1.8 2.5 1.8 2.0 1.5 2.0 1.5 1.8 3.5 3.8 1.5 2.3 2.5 3.0 1.5 2.8 3.25 2.75 21.6 20.5 17.3 20.3 19.8 18.3 18.3 19.5 18.2 19.4 18.3 20.8 19.6 18.9 19.7 18.9 18.1 17.6 18.0 18.3 18.4 17.0 20.1 17.9 20.4 16.8 15.7 17.5 † The 2007 irrigated test received 7.35 inches of water. The irrigation pump was out of service for 12 days. EVALUATIONS OF CORN HYBRIDS IN ALABAMA 2007 15 TABLE 10. GROWING SEASON RAINFALL, 2005-2007. ---------------------------- Monthly rainfall in inches --------------------------Location Year Mar. Apr. May June July Aug. Sept. 7-month total Belle Mina 2007 2006 2005 Crossville 2007 2006 2005 Shorter 2007 2006 2005 Prattville 2007 2006 2005 Brewton 2007 2006 2005 Fairhope 2007 2006 2005 Headland 2007 2006 2005 1.3 0.7 5.5 7.3 1.2 9.2 0.1 4.1 3.1 1.4 2.6 11.1 5.2 2.7 5.3 3.8 3.5 8.8 4.2 4.6 2.2 23.3 19.4 45.2 0.5 0.4 4.3 3.4 6.1 20.5 1.9 3.2 7.1 6.4 1.3 10.4 7.1 5.4 11.4 5.9 4.2 11.4 6.6 5.3 4.7 31.8 25.9 69.8 1.0 2.8 6.4 11.6 2.8 14.2 1.3 7.0 3.3 3.5 2.7 8.0 6.7 3.6 9.8 6.1 8.9 7.4 6.5 4.0 10.1 36.7 31.8 59.2 1.0 5.3 8.5 2.5 2.2 6.8 0.6 3.1 3.4 1.6 0.8 4.0 2.8 3.4 9.2 2.9 2.5 4.3 1.9 3.2 3.2 13.3 20.5 39.4 3.4 3.7 11.1 2.0 1.9 7.8 0.3 3.6 2.2 0.8 1.2 3.1 7.0 2.3 10.1 2.0 4.9 3.2 2.3 3.1 2.0 17.8 20.7 39.5 1.3 2.8 7.0 4.4 6.6 4.6 0.7 3.6 2.4 1.6 2.9 5.0 4.3 1.2 7.2 3.0 1.9 3.2 4.3 5.5 2.0 19.6 24.5 31.4 1.1 2.0 3.6 4.6 4.9 5.4 1.0 4.2 1.4 1.2 1.8 3.7 3.7 2.4 6.6 1.1 2.5 3.5 1.2 3.1 3.4 13.9 20.9 27.6 16 ALABAMA AGRICULTURAL EXPERIMENT STATION TABLE 11. SOIL TYPES FOR CORN TRIALS, 2007. Test location North Soil type Belle Mina..................................................................................... Decatur silt loam Crossville ...................................................................................... Wynnville fine sandy loam Central Shorter ........................................................................................... Norfolk sandy loam Prattville ........................................................................................ Lucedale fine sandy loam South Brewton ......................................................................................... Benndale fine sandy loam Headland ....................................................................................... Dothan sandy loam Fairhope ........................................................................................ Malbis fine sandy loam SOURCE OF 2007 CORN HYBRID TRIAL SEED Seed Company Grabow Seed Services, Inc. P.O. Box 88823 Atlanta, GA 30356 NK Brand Seed 13760 Appomattox Cr. Laurinburg, NC 28352 Land O’Lakes P.O. Box 614 Midland City, AL 36350 Brand AgraTech Seed Company Monsanto Company 800 N. Lindbergh Blvd St. Louis, MO 63167 Southern States 6606 West Broad St. Richmond, VA 23260 UAP Southeast 25324 HSV-Brownsferry Rd Madison, AL 35756 Brand Dekalb DKC Garst/NK Brand SS Croplan Dyna-Gro