2000 Corn Performance Trials: Corn

Transcription

1 South Dakota State University Open PRAIRIE: Open Public Research Access Institutional Repository and Information Exchange Agricultural Experiment Station Circulars SDSU Agricultural Experiment Station Corn Performance Trials: Corn R. G. Hall South Dakota State University, robert.hall@sdstate.edu K. K. Kirby South Dakota State University, kevin.kirby@sdstate.edu Follow this and additional works at: Recommended Citation Hall, R. G. and Kirby, K. K., "2 Corn Performance Trials: Corn" (2). Agricultural Experiment Station Circulars. Paper This Circular is brought to you for free and open access by the SDSU Agricultural Experiment Station at Open PRAIRIE: Open Public Research Access Institutional Repository and Information Exchange. It has been accepted for inclusion in Agricultural Experiment Station Circulars by an authorized administrator of Open PRAIRIE: Open Public Research Access Institutional Repository and Information Exchange. For more information, please contact michael.biondo@sdstate.edu.

2 C253 Revised Annually Trials

3 Tables, 2 corn performance trials A Soil classification and land preparation... 6 B Trial cooperators, locations, test populations, and seeding and harvest dates... 6 C Nearest station precipitation and GDD accumulation... 7 D Conventional hybrids by brand I hybrid and yield table number... 8 E Roundup Ready hybrids by brand I hybrid and yield table number... 2 F Seed company addresses and telephone numbers... Conventional hybrid trial results Watertown, early maturity Watertown, late maturity Frankfort, no-till, early maturity Frankfort, no-till, late maturity Brookings, early maturity Brookings, late maturity Armour, no-till, early maturity Armour, late maturity Beresford, early maturity... 3 Beresford, late maturity Roundup Ready* hybrid trial results Brookings, early maturity Brookings, late maturity Beresford *Roundup Ready is registered by Monsanto. SDSU Published in accordance with an act passed in 88 by the 4th Legislative Assembly, Dakota Territory, establishing the Dakota Agricultural College and with the act of reorganization in 887 by the 7th Legislative Assembly, which established the Agricultural Experiment Station at South Dakota State University. SDSU is an Affirmative Action/Equal Opportunity Employer (male/ female) and offers all benefits, services, education, and employment opportunities without regard for ancestry, age, race, citizenship, color, creed, religion, gender, disability, national origin, sexual preference, or Vietnam Era veteran status. 32 copies printed by AES at a cost of $.87 each. AX62 2/

4 2 Corn Performance Trials Robert G. Hall, Professor I Extension Agronomist Project Leader, Crop Performance Testing and Kevin K. Kirby, Senior Agricultural Research Manager Crop Performance Testing Plant Science Department Agricultural Experiment Station South Dakota State University Brookings, SD Entries and their yield table locations are reported in Tables D and E. This publication reports the performance of entries in the 2 South Dakota corn hybrid performance trials. It includes both conventional (non-roundup-ready) and Roundup-Ready hybrids. Information includes both 999- and 2 grain yields in bushels per acre; and 2 test weight, moisture percentages of shelled corn at harvest and stalk lodge percentages. Test trials are conducted by the South Dakota State University Crop Performance Testing (CPT) program. through the tasselling stage. Generally, if green snap occurs at the 5- through 8-leaf stages yield reductions will be greater than if green snap occurs at the 2-leaf through tasselling stages. At Frankfort the green snap occurred at the 5-leaf through 8-leaf stage growth phase. In the early maturity test (Table 3) the green snap percentages ranged from to 48% and in the late maturity test (Table 4) from to 42%. Damage appeared to be greatly affected by hybrid. These results strongly suggest the use of several hybrids, as opposed to just one or two hybrids, would help combat high yield losses from green snap. Frankfort was the only test site experiencing measurable green snap losses. Test Trial Locations Trial locations, soil types, and seedbed preparation are indicated in Table A. Test populations, seeding and harvest dates are given in Table B. Seeding started on April 26 and was completed by May 2. The Frankfort plots were hit by high winds on July, 2, that caused moderate to severe green snap in several hybrids. In this case green snap is defined as a clean break at one of the intermediate nodes which also resulted in no ear development on the damaged stalk. Green snap is most likely to occur at one of two growth phases of the corn plant. First, it may occur as the plant approaches the 5-leaf stage and continues through the 8-leaf stage. Second, it may occur later as the plant approaches the 2-leaf stage and continues Weather and Climatic Conditions Climatic data (Table C) for this year's growing season, April-September, was obtained from the South Dakota Automatic Weather Data Network. Growing degree day (GDD) information for two locations was obtained from alternate weather reporting sites. The Frankfort GDD information was obtained from Huron while the Armour information was an average of the Mitchell and Yankton data. Mitchell and Yankton data was used to compute an Armour GDD average because () there was little difference in the data between the two locations and (2) because Armour lies somewhat between them. The remaining climatic reporting stations are located at or near their respective test trial sites. Precipitation may differ between a

5 given test site and its respective climatic recording station. At Redfield the precipitation data was missing except for August and September. Monthly precipitation totals were variable across locations. Monthly levels varied from a low of.54 inches at Centerville in September to a high of 6.74 at Brookings in May. This high of 6.74 inches for Brookings in May was critical to the crop since Brookings received below average precipitation for the rest of the growing season. The highest accumulation of recorded seasonal precipitation was at Brookings with 5.52 inches or 2. inches below average. Centerville and Armour both reported more than 4 inches below average while Watertown reported 2 inches below average in seasonal rainfall. The heat unit or GDD accumulations are reported for the nearest test site in place of temperatures. Corn hybrids typically express a certain thermal or heat unit requirement from emergence to black-layer formation (physiological maturity). The heat unit totals across test locations varied from a high of 329 GDDs at Armour to a low of 2342 GDDs at Brookings. At Armour, Centerville, Redfield, and Watertown the GGD seasonal accumulations were above average; while Brookings was 76 GDDs below average for the growing season. The 2 GDD total for the Armour site is an average of the Mitchell and Yankton data. In summary, the major environmental impact in 2 was the below average rainfall received across most of eastern South Dakota. The seasonal GDD totals across this region varied only slightly and were probably not a significant factor in test trial areas this year. The assistance of the following is appreciated: CPT technician Jesse Hall at Brookings, Jim Smolik and Allen Heuer at the NE Research Farm, Todd Bortnem and the Brookings Agronomy Farm staff, and Bob Berg and the SE Research Farm staff; and farmercooperators Robert Clark (Armour) and Steve Masat (Frankfort). General Test Procedures Participating companies pick the test locations where their entries are tested. Entries are placed into "early" or "late" maturity trials. The arbitrary relative maturity breaks between the early and late tests as follows: 95 days for Watertown; days for Frankfort and Brookings; 5 days for Armour; and days for Beresford. Hybrids are assigned to maturity trials based on relative maturity ratings defined by the participating company. This testing program does not guarantee that all entries are placed in the proper maturity trial. In some trials, borderline entries with relative maturity ratings at or near the arbitrary break between the early and late trials may crossover at a given location. In some cases this may be indicated by exceptionally high or low grain moisture contents at harvest. A higher than average moisture content may indicate the hybrid is later in relative maturity than indicated. Likewise, a lower than average moisture may indicate the hybrid is earlier in relative maturity than indicated. A fee was charged for all entries at each location. A list of participating seed companies for 2 is presented in Table F. Experimental Procedures Entries were seeded in three replications with each hybrid randomly located within a replication. Plots consisted of two 3-inch rows, 2 feet long. A 3-cell cone drill seeder was used for all plots. Cone units were mounted above commercial maxi-merge units. Seeding rate was 5% more than the desired number of plants harvested per plot. Plots were later thinned to a desired test population. In 2, following emergence all test plots were thinned to a final test population of 27,878 plants per acre. Soil type, land preparation, and previous crop at each test site are outlined in table A. Seedbed preparation was good at all locations. A starter fertilizer of pounds/ A of was applied 2 inches below and 2 inches to the side (2 x 2) of the seed row. Force insecticide was T-banded at label rates for corn rootworm control this year. Recommended herbicides (pre-emergence and postemergence) were broadcast at labeled rates where needed. The experimental procedures described above apply both to the conventional and the Roundup Ready hybrid corn trials with one exception: Weed control in the Roundup Ready trials consisted of two post emergence applications of Roundup Ultra (32 oz/ A). The first was when weeds were 2-4 inches tall, the second application was when weed growth was again 2-4 inches tall. Measurements of Performance Yield. Yields are an average of three replications, and are expressed as bushels per acre, adjusted to 5.5% moisture on a dry-matter basis and a bushel weight of 56 pounds. Hybrids of equal potential may yield differently because of variations in slope, soil fertility, and stand. 2

6 Statistical tests were conducted to determine whether differences obtained were caused by variations in environment or were true variety differences. In 2, the coefficient of variation (CV) for yield was within reasonable limits across all locations. The CV value in a given test trial is a measure of experimental error associated with the test trial. Ideally, this value should not exceed 5%. In cases where the CV value exceeds 5% it is recommended that the test data be used with caution in making hybrid selection decisions. Experimental error may be the result of several factors including test methods; factors such as moisture, temperature, or soil variations; or agronomic factors like seeding date, reseeding, or seed quality. All of these may or may not be controllable in a given year. Moisture Content. Moisture content is expressed as the percentage of moisture in the shelled corn at harvest. Moisture is inversely related to maturity. Because maturity is of prime importance in South Dakota, moisture figures are of considerable importance in the evaluation of the trial entries. Hybrids that provide satisfactory yields and can be stored without additional drying are desirable. Use of tables. Check for the "least ignificant.difference" (LSD) value at the bottom of each column of data averages. The LSD value indicates how much a variable such as yield must differ between two hybrids before there is a real yield difference. An LSD value is given at the bottom of every column where there is significant difference among the averages within a given column. If there are no real differences among the averages within a given column a "nonsignificant" (NS) difference designation is indicated. The LSD values reported in this publication can be used in two ways. In this publication the LSD value is used primarily to identify the top-yielding group for each test trial. For example, at Watertown (Table ) the highest 2-year yield was 65 bu/ A for Kruger EX-296. In order to determine whether it is the only top yielding hybrid at Watertown use the LSD value of 5 bu/ A at the bottom of the 2-yr yield column. In order for hybrids to be in the top-yield group they must yield 5 bu/ A (65-5 = 5) or higher. Technically, a yield of 5 bu/ A would be in the top-yield group while a yield of 5 bu/ A would not be in the top-yield group. However, all yields and LSD values are rounded to the nearest whole number. We can say 5 bu/ A, because of the rounding-off, is the more appropriate minimum value for top-yield hybrids at the "early" maturity test at Watertown in 2. This value is indicated as the min. top-yield value at the bottom of the 2-yr yield column. Top-yield hybrids for 2 are those hybrids which are equal or higher than the minimum top-yield value indicated at the bottom of the 2 yield column. In addition to identifying the top-yield group, LSD values can be used to determine whether two hybrids differ in performance. For example, in the early test at Watertown, the LSD value of 5 bu/ A can be used to compare the yields of any two hybrids in the early maturity trial. If hybrid A yields 65 bu/ A and hybrid B yields 5 bu/ A their yield difference is 4 bu/ A (65-5 = 4). In this case the two hybrids do not differ in yield because their yield difference of 4 bu/ A is less than the reported LSD value of 5 bu/ A. In contrast, if hybrid C yields 48 bu/ A the yield difference between hybrid A and hybrid C would be 7 bu/ A (65-48 = 7). In this case the yield difference of 7 bu/ A is more than the reported LSD value of 5 bu/ A and therefore hybrid A would have a significantly higher yield than hybrid C. NOTE: In 2, many hybrid yields across our test locations were very good, considering most locations started the growing season with minimal subsoil moisture levels and received below average rainfall during the growing season. Since we knew subsoil moisture levels were low to begin with, we did little if any tillage, in order to conserve soil moisture levels. Performance Trial Results: Conventional Hybrids The performance trial results for two years (999-) and one year (2) are summarized below: Watertown (NE Research Farm): Early Maturity Trial (Table ). The number of hybrid entries was 46. The 2-year average was 45 bu/ A, hybrids had to average 5 bu/ A or higher to be in the top-yield group (TYG), 5 hybrids qualified for the top-yield group, and hybrids had to differ by 5 bu/ A to be significantly different in yield. The 2 average was 8 bu/ A, hybrids had to average 5 bu/ A or higher to be in the top-yield group, one hybrid qualified for the top-yield group, and hybrids had to differ by 8 bu/ A to be significantly different in yield. Late Maturity Trial (Table 2). The number of hybrid entries was 49. The 2-year average was 29 bu/ A, hybrids had to average bu I A or higher to be in the top-yield group (TYG), 8 hybrids qualified for the top-yield group, and hybrids had to differ by 2 bu I A 3

7 to be significantly different in yield. The 2 average was 22 bu I A, hybrids had to average 3 bu I A or higher to be in the top-yield group, 5 hybrids qualified for the top-yield group, and hybrids had to differ by bu/ A to be significantly different in yield. Frankfort, No-Till Trial (Steve Masat Farm): Early Maturity Trial (Table 3). The number of hybrid entries was 47. The 2-year average was 4 bu/ A. This test was not able to detect hybrid yield differences among the 2 hybrids tested for 2 years. The yield ranking of the hybrids for 999 were so different from those for 2 the test was unable to detect significant yield differences for the 2-year averages. The 2 average was 54 bu/ A, hybrids had to average 68 bu/ A or higher to be in the top-yield group, 2 hybrids qualified for the top-yield group, and hybrids had to differ by 8 bu/ A to be significantly different in yield. Late Maturity Trial (Table 4). The number of hybrid entries was 38. The 2-year average was 49 bu/ A. Again as in table 4 this test was not able to detect hybrid yield differences among the 9 hybrids tested for 2 years. The yield ranking of the hybrids for 999 were so different from those for 2 the test was unable to detect significant yield differences for the 2-year averages. The 2 average was 47 bu/ A, hybrids had to average 52 bu I A or higher to be in the top-yield group, 5 hybrids qualified for the topyield group, and hybrids had to differ by 22 bu I A to be significantly different in yield. Brookings (SDSU Agronomy Farm): Early Maturity Trial (Table 5). The number of hybrid entries was 58. The 2-year average was 69 bu/ A, hybrids had to average 58 bu/ A or higher to be in the top-yield group (TYG), 6 hybrids qualified for the top-yield group, and hybrids had to differ by 2 bu I A to be significantly different in yield. The 2 average was 79 bu/ A, hybrids had to average 83 bu/ A or higher to be in the top-yield group, 2 hybrids qualified for the top-yield group, and hybrids had to differ by bu/ A to be significantly different in yield. Late Maturity Trial (Table 6). The number of hybrid entries was 47. The 2-year average was 83 bu/ A, hybrids had to average 75 bu/ A or higher to be in the top-yield group (TYG), 8 hybrids qualified for the top-yield group, and hybrids had to differ by 9 bu/ A to be significantly different in yield. The 2 average was 87 bu/ A, hybrids had to average 93 bu I A or higher to be in the top-yield group, hybrids qualified for the top-yield group, and hybrids had to differ by 2 bu I A to be significantly different in yield. Armour, No-Till Trial (Robert Clark Farm): Early Maturity Trial (Table 7). The number of hybrid entries was 4. The 2-year average was 4 bu/ A. This test was not able to detect hybrid yield differences among the 9 hybrids tested for 2 years. The yield rankings of the hybrids for 999 were so different from those for 2 the test was unable to detect significant yield differences for the 2-year averages. The 2 average was 9 bu I A, hybrids had to average 8 bu/ A or higher to be in the top-yield group, 26 hybrids qualified for the top-yield group, and hybrids had to differ by 2 bu/ A to be significantly different in yield. Late Maturity Trial (Table 8). The number of hybrid entries was 6. The 2-year average was 58 bu I A, hybrids had to average 58 bu I A or higher to be in the top-yield group (TYG), hybrids qualified for the top-yield group, and hybrids had to differ by 2 bu I A to be significantly different in yield. The 2 average was 5 bu I A, hybrids had to average 49 bu/ A or higher to be in the top-yield group, 36 hybrids qualified for the top-yield group, and hybrids had to differ by 9 bu I A to be significantly different in yield. Beresford: (SE Research Farm): Early Maturity Trial (Table 9). The number of hybrid entries was 74. The 2-year average was 6 bu/ A, hybrids had to average 57 bu/ A or higher to be in the top-yield group (TYG), 22 hybrids qualified for the top-yield group, and hybrids had to differ by 22 bu/ A to be significantly different in yield. The 2 average was 68 bu/ A, hybrids had to average 79 bu/ A or higher to be in the top-yield group, 8 hybrids qualified for the top-yield group, and hybrids had to differ by 2 bu/ A to be significantly different in yield. Late Maturity Trial (Table ). The number of hybrid entries was 36. The 2-year average was 63 bu/ A, hybrids had to average 69 bu/ A or higher to be in the top-yield group (TYG), 3 hybrids qualified for the top-yield group, and hybrids had to differ by 6 bu/ A to be significantly different in yield. The 2 average was 83 bu I A, hybrids had to average 86 bu/ A or higher to be in the top-yield group, 7 hybrids qualified for the top-yield group, and hybrids had to differ by 9 bu/ A to be significantly different in yield. 4

8 Performance Trial Results: Roundup Ready Hybrids Brookings (SDSU Agronomy Farm): Early Maturity Trial (Table ). The number of hybrid entries was 9. The 2-year average was 47 bu/ A. There was no significant yield difference in 2-year averages among the 5 hybrids tested. Therefore, all 5 hybrids were in the top-yield group. The 2 average was 7 bu I A, hybrids had to average 7 bu I A or higher to be in the top-yield group, 2 hybrids qualified for the top-yield group, and hybrids had to differ by bu I A to be significantly different in yield. Late Maturity Trial (Table 2). The number of hybrid entries was 6. The 2-year average was 67 bu/ A. There were only 2 hybrids tested for 2 years and there was no significant difference between them in 2-year yield averages. The 2 average was 88 bu I A, hybrids had to average 2 bu I A or higher to be in the top-yield group, 3 hybrids qualified for the topyield group, and hybrids had to differ by 5 bu/ A to be significantly different in yield. Beresford (SE Research Farm): Note: The early and late maturity trials were combined into a single trial because there were only three late maturity hybrids. The relative maturity rating of these hybrids (Jacobsen J4753RR, US Seeds Clll9RR, and US Seeds Cl9RR) was -day compared to the -day cut off value for the early test. Early Maturity Trial (Table ). The number of hybrid entries was 26. The 2-year average yield was 43 bu I A. There was no significant yield difference in 2-year averages among the 9 hybrids tested. Therefore, all 9 hybrids were in the top-yield group. The 2 average was 65 bu/ A, hybrids had to average 63 bu/ A or higher to be in the top-yield group, 6 hybrids qualified for the top-yield group, and hybrids had to differ by 27 bu I A to be significantly different in yield. 5

9 Table A. Soil classification and land preparation. Location Soil type Seedbed, previous crop Brookings Watertown Frankfort Beresford Armour Brandt sil. cl. Brookings silty clay loam Beotia silt loam Trent silty loam Eakin-Ethan complex conventional, spring wheat conventional, oat no-till, soybean stubble conventional, soybean no-till, soybean stubble Table B. Year 2 trial cooperators, locations, test populations, and seeding and harvest dates. Test* population Date Cooperators Location (plants/acre) Seeded Harvested Robert Clark Armour 27,878 April 26 Oct. 7 SE Research Farm Beresford 27,878 April 27 Oct. 2 SDSU Agronomy Farm Brookings 27,878 May Oct. 8 NE Research Farm Watertown 27,878 May 2 Oct. 2 Steve Masat Frankfort 27,878 May 2 Oct. * Plots were thinned to this population following emergence. 6

10 Table C. Nearest station precipitation and growing degree day (GDD) seasonal accumulation for the 2 cropping season and their departures (+/-) from average. Source: South Dakota Automatic Weather Data Network. Station Data variable Apr May Jun Jul Aug Sep Total Armour Precip. ' (in. ) Avg. (in. ) Airport Precip. +/- (in. ) l Ac cum. ' (GOD) * GDD's Avg. (GDD) * GDD's +/- (GOD) * Brook- Precip. I (in ) ings Avg. (in. ) Precip. +/- ( i n. ) NE Ace um. ' (GOD) GDD's Avg. (GDD) GDD's (GOD) Center- Precip. ' (in. ) vi e Avg. (in. ) Precip. ( i n. ) SE Accum. ' (GOD) GDD's Avg. (GDD) GDD's +/- (day) Red- Precip. ' (in. ).3.8 field Avg. (in. ) Precip. +/- ( i n. ) 2NE Ac cum. ' (GOD) GDD's Avg. (GDD) GDD's +/- (GOD) Water- Precip. I (in o ) town Avg. (in. ) Precip. ( i n. ) Airport Ac cum. ' (GOD) GDD's Avg. (GDD) GDD's (GOD) * values in this row are an average of the Mitchell and Yankton data. +/- +/- +/- +/- +4 7

11 Table D. 2 corn performance trials-conventional non-roundup Ready hybrids by brand/hybrid and yield table number. Table Table No. Brand I Hybrid No. No. Brand I Hybrid No. CARGI LL/ 42 BT 4 4 ASGROW/RX452YG 2,3,5 2 CARGI LL/452 BT 4,7 42 ASGROW/RX58YG 4,6,7,9 3 CA RGI LL/652 BT 8 43 ASGROW/RX634 4,6,8,9 4 CA RG I LL/252 BT 3 ASGROW/RX73YG 5 CA RGI LL/388 BT 4 45 GARST/ CA RGI LL/532 BT 7 46 GARST /8 IT 8 7 CA RG I LL/692 BT 8 47 GARST/8647 4,7 8 DEKALB/DK44 48 GARST/853 BT 8,9 9 DEKALB/DK389BTY 49 GARST/N7543 8,9 DEKALB/DK57 2,5 5 GARST/N DEKALB/DK GARST /7477IT 2 DEKALB/DK5BTY 9 52 GARST/N9525BT 8,9 DEKALB/DKC GARST /N7734 4,6 4 DEKALB/DKC GARST/N9734 4,6 5 DEKALB/DKC ,5 55 GARST/879 BT 2,3,5 6 DEKALB/DKC ,3,5 56 GARST /8766IT 2,3,5 7 DEKALB/DKC ,3,5 57 GARST /88 IT. 3 8 DEKALB/DKC ,5 58 WILSON /664 8, 9 DEKALB/DKC ,3,5 WI LSON/464 8,9 2 DEKALB/DKC ,7 6 WI LSON/475PT 8,9 2 DEKALB/DKC ,8,9 6 WI LSON/64 7,9 22 MALLARD/UC WILSON/E68 8,9 23 MALLARD/UC WILSON/E953BT 8,9 24 MALLARD/UC-X TOP FARM/TFSX MALLARD/UC-X TOP FARM/TFSX 22 2,5 26 DAIRYLAND/STEALTH TOP FARM/TFSX 5BT 4,6,9 27 DAIRYLAND/STEALTH TOP FARM/TFSX DAI RYLAND/STEALTH TOP FARM/TFSX 79BT 29 DAIRYLAND/STEALTH-57 8,9 69 TOP FARM/TFSX DAI RYLAND/STEALTH TOP FARM/TFSX 796BT 2,3,5 3 DAI RYLAND/STEALTH TOP FARM/TFSX ,3,5 32 DAIRYLAND/STEALTH TOP FARM/TFSX 223 2,4,6 33 DAIRYLAND/STEALTH TOP FARM/TFSX 722BT 4,6,9 34 DAIRYLAND/STEALTH KAYSTAR/KX-777 8,9 35 DAIRYLAND/STEALTH-496BT 2 75 KAYSTAR/X DAIRYLAND/STEALTH-69 8,9 76 KAYSTAR/X9973 2,3,5 37 DAI RYLAND/STEALTH-4BT 3 77 KAYSTAR/KX-625BT 4 38 SANDS/SOI 926 8, 78 KAYSTAR/X3 4,6 39 ASGROW/RX KAYSTAR/X942 6,7 4 ASGROW/RX393YG. 3, 5 8 KAYSTAR/X955 4,6 44 8

12 Table D (continued). Table Table No. Brand I Hybrid No. No. Brand I Hybrid No. 8 KAYSTAR/KX KRUGER/K-94 2,4,6 82 KAYSTAR/X2 8, 22 KRUGER/ EX KALTENBERG/K KRUGER/K-96BT 4,6,7 84 KALTENBERG/K4848BT 2 24 KRUGER/ EX -6BT 4,7 85 KALTENBERG/K KRUGER/EX-9 4,6,7 86 KALTENBERG/K2727BT 26 KRUGER/K-99BT 4,6,7 87 KAL TENBERG/K466 2,5 27 KRUGER/K-98 6,7 88 KALTENBERG/K477 2,5 28 KRUGER/K-9 8,9 89 KALTENBERG/K KRUGER/ EX - lbt 8 9 KALTENBERG/K55BT 6 KRUGER/K-9 8,9 9 KAL TENBERG/ K KRUGER/K-96 4B 8,9 92 LG SEEDS/LG KRUGER/K-9 8,9 93 LG SEEDS/LG 252 6,7 3 KRUGER/K-9 BT 8,9 94 LG SEEDS/LG KRUGER/K-994 8, 95 LG SEEDS/LG KRUGER/K-95A 96 LG SEEDS/LG KRUGER/K-9 +BT 8,9 97 LG SEEDS/LG ,3 7 KRUGER/K LG SEEDS/LG 25BT 5 8 KRUGER/K KRUGER/K-96 4A 9 9 KRUGER/ K-95 KRUGER/ K-982A 3,5 4 JACOBSEN/JS56 8, KRUGER/K-992 8,9 4 JACOBSEN/JS4685 8,9 2 KRUGER/ K-998BT 6,7 42 JACOBSEN/JS425BT 7 KRUGER/ EX JACOBSEN/JS4785BT 8, 4 KRUGER/ K-92,3 44 JACOBSEN/JS4645BT 8,9 5 KRUGER/K JACOBSEN/JS KRUGER/K-92BT 2,3,5 46 JACOBSEN/JS KRUGER/K-993BT 2,5 47 JACOBSEN/JS434 7,9 8 KRUGER/EX JACOBSEN/JS4583 8,9 9 KRUGER/ K-99BT 6,8,9 49 JACOBSEN/JS4685BT 8,9 KRUGER/K-98 4,6,7 5 PAYC/468 KRUGER/K-9 BT 8,9 5 NC+/ KRUGER/ K-94BT 8 52 NC+/2 KRUGER/K-96 4ABT 8,9 53 NC+/ KRUGER/ K-9 4BT 8, 54 NC+/ KRUGER/EX-87BT, 3, 5 55 NC+/4649B 6 KRUGER/EX HOEGEMEY ER/ KRUGER/K-982BT 2,3,5 57 HOEGEMEYER/269 8,9 8 KRUGER/K-9 2,3,5 58 HOEGEMEY ER/ , 9 KRUGER/ K-92+ 2,3,5 HOEGEMEY ER/ 28 7,9 2 KRUGER/K-95 2,4,6 6 HOEGEMEYER/

13 Table D (continued). Table Table No. Brand I Hybrid No. No. Brand I Hybrid No. 6 HOEGEMEY ER/ 26 8,9 2 WENSMAN/W 588 BT 62 HOEGEMEYER/26 22 WENSMAN/W 5258 BT, 3, 5 63 HOEGEMEYER/ WENSMAN/W 539 BT 2,3,5 64 EPLEY/E2422 6,8,9 24 WENSMAN/W 5329 BT 2,3,5,7,9 65 EPLEY/E368 8, 25 WENSMAN/W 53 BT 4,6,7,9 66 EPLEY /Ell6 2,5 26 WENSMAN/W ,6,7,9 67 EPLEY/El46 2,6,7 27 DENBESTEN/8289, 3, 5 68 EPLEY/E362 8, 28 DENBESTEN/8272 2,4,6,7 69 EPLEY /E5BT 6,7,9 29 DENB ESTEN I 826 8, 7 EPLEY/El47 BT 2, 6, 7, 9 2 DENBESTEN/82985,3,5 7 EPLEY /E36 BT 8, 2 DENBESTEN/8294 2,4,6,7 72 EPLEY/El27, 5 22 DENBESTEN/DB295BT 2,4,6,7,9 73 EPLEY /Ell3, 5 2 DENBESTEN/DB292BT 2,4,6,7 74 EPLEY/E2433 6,8 24 DENBESTEN/DB2 BT 8, 75 MUSTANG/53 2,3,5 25 DENBESTEN/DB292BT 8, 76 MUSTANG/39 26 DENBESTEN/DB285BT,3,5 77 MUSTANG/42, 5 27 DENBESTEN/DB29BT, 3, 5 78 MUSTANG/ DENBESTEN/DB299BT 2,3,5,7 79 MUSTANG/ DENBESTEN/826 4,6,7,9 8 MUSTANG/5BT 6 22 DENBESTEN/829 8,9 8 MUSTANG/4BT, 5 22 DENBESTEN/8222 8, 82 MUSTANG/6464 4,6,9 222 DENBESTEN/ MUSTANG/5353 2,4,6 223 us SEEDS/US C99 84 MUSTANG/75BT us SEEDS/US C969 2,3 85 MYCOGEN/2725 8, 225 us SEEDS/US Cl9 3,5 86 MYCOGEN/262 6,7,9 226 us SEEDS/US Cl 7,9 87 MYCOGEN/ us SEEDS/US Cl99 8,9 88 MYCOGEN/2525 2,3,5 228 us SEEDS/US Cl29BT 6,7 89 MYCOGEN/2566 2,4,6,7 229 us SEEDS/US Cll9BT 8,9 9 MYCOGEN/2652 6,8,9 23 us SEEDS/US E87 9 MYCOGEN/2657 6,8,9 23 us SEEDS/US E97 2,3 92 MYCOGEN/2799IMI 232 us SEEDS/US C98 3,5 93 MYCOGEN/2249IMI 233 us SEEDS/US Cl3 4,6 94 MYCOGEN/2544IMI 2,3,5 234 SEEDS 2/3 2, 3, 5 95 MYCOGEN/277IMI 8,9 235 SEEDS 2/32BT 2,4,6 96 MYCOGEN/2722IMI 8, 236 SEEDS 2/2942BT,3,5 97 MYCOGEN/2767 8, 237 SEEDS 2/295BT 2,3,5 98 MYCOGEN/ SEEDS 2/298 2,3,5 99 WENSMAN/MAX 7, 3, SEEDS 2/X36BT 7 2 WENSMAN/MAX 27, 3, 5 24 HEI NE/H84

14 Table D (continued). Table Table No. Brand I Hybrid No. No. Brand I Hybrid No. 24 HEINE/H HEI NE/H HEI NE/H HEI NE/H HEI NE/H HEI NE/H HEI NE/H HEI NE/H DAHLCO/X DAHLC/ DAHLC/2472 2,5 252 DAHLCO/X DAHLCO/X DAHLC/ DAHLCO/X GOLD COUNTRY/ GOLD COUNTRY/ GOLD COUNTRY/95, 5 2 GOLD COUNTRY/X GOLD COUNTRY/X GOLD COUNTRY/X6984BT GOLD COUNTRY/X GOLD COUNTRY/X DAKOTA/TR8

15 Table E. 2 corn performance trials-roundup Ready hybrids by brand/hybrid and yield table number. No. Brand I Hybrid Table No. No. Brand I Hybrid Table No. ASGROW/RX6RR/YG 2 ASGROW/RX489RR 3 ASGROW/RX2RR 4 TOP FARM/TFSX 8RR 5 TOP FARM/TFSX 82 RR 6 TOP FARM/TFSX 85RR 7 KAYSTAR/KX-62RR 8 KAYSTAR/KX-77RR 9 KAYSTAR/KX-57RR KAYSTAR/KX-777 RR KRUGER/K-999RR 2 KRUGER/K-999RRBT KRUGER/K-92RR 4 KRUGER/K-99RRBT 5 KRUGER/EX-2RR 6 KRUGER/K-992RR 7 JACOBSEN/J4256RR 8 JACOBSEN/J4655RR 9 JACOBSEN/J4753RR 2 EPLEY/E-485RR 2 EPLEY/E-4R85BT 22 EPLEY/E-55RR 23 EPLEY/E365RR 2, 2,,, 2, 2, 2, 2, 2, 2, 2, 24 MUSTANG/52RR 25 MUSTANG/65RR 26 MUSTANG/42RR 27 DENBESTEN/DB2 2RR 28 DENBESTEN/DB22RR 29 DENBESTEN/DB295 RR 3 DENBESTEN/DB22RRBT 3 DENBESTEN/DB24RR 32 DENBESTEN/DB25RR 33 us SEEDS/US C9RR 34 us SEEDS/US C79RR 35 us SEEDS/US C9RR 36 us SEEDS/US C9RR 37 us SEEDS/US E98RR 38 us SEEDS/US E4RR 39 us SEEDS/US E9RR 4 SEEDS 2/32RR 4 SEEDS 2/298 RR/BT 42 SEEDS 2/34RR 43 SEEDS 2/X39RR 44 DAHLC/2475RR 45 DAHLC/254 2, 2, 2, 2, 2, 2 2 2

16 Table F. Seed company addresses and telephone numbers for 2. Company Brand Name Address City and State Zip Phone Number Ca rgi Hybrid Seeds Dahl co Seeds Dairyl and Seeds Dakota Brand Seed Den Besten Seed Co. Cargi ll Dahl co Stealth Dakota Den Besten PO Box Th St SW PO Box Th St SE Box 896 Minneapol is. MN Cokato. MN West Bend. WI Watertown. SD Pl atte. SD Domestic Seed & Supply Inc. Mustang Epley Brothers Hybrids Inc. Epley Box 466 PO Box 3 Garst Seed Co. Garst PO Box 647 Gol d Country Seed Gold Country PO Box 64 Heine Seedcorn Heine 2 E 32Th St Madison. SD Shel l Rock, IA Brandon. SD Hutchinson. MN Vermi llion. SD Hoegemeyer Hybrids Jacobsen Hybrid Corn Co. Kal tenberg Seeds Kaystar Seeds Kruger Seed Company Hoegemeyer Jacobsen Kal tenberg Kays tar Kruger 755 Hoegemeyer Rd 9 9Th St 556 State Hwy 9 PO Box 947 Hwy 2 East. Box A Hooper. NE Lake View. IA Waunakee. WI Huron, SD Dike. IA LG Seeds Mal lard Seed Co. Inc. Monsanto Gl obal Seed Grp. Monsanto Global Seed Grp. Mycogen Seeds LG Seeds Mal lard As grow Dekalb My cog en 62 Hwy PO Box Sycamo re Rd 3 Sycamore Rd 4 Corp.Ctr.Curve Gibbon. NE Pl ainview. MN Dekalb, IL Dekalb, IL Eagan. MN NC+ Hybrids Sand Seed Service Inc. Seeds 2 Top Farm Hybrids United suppl iers Inc. NC+ SOI Seeds 2 Top Farm U.S. Seeds Box 448 PO Box 648 Box 2 Box 85 PO Box 538 Lincoln. NE Marcus. IA Breckenridge. MN Cokato, MN Eldora. IA Wensman Seed Company Wil son Genetics. L.L.C. Wensman Wi l son PO Box 9 PO Box 39 Wadena. MN Harlan. IA

17 Table. Watertown early corn hybrid results, 999-2, NE Research Farm. Test relative maturity is 95-day or less Stk.Ldg. Yield - bu/a Grain Bushel Green below (5.5% moi st) moi st wei ght snap ear Brand I Hybrid 2 - yr 2 pct b pct pct Entries tested two years KRUGER/ EX MUSTANG/ DEKALB/DK KRUGER/ K MUSTANG/ DAIRYLAND/STEALTH WENSMAN/MAX WENSMAN/MAX DENBESTEN/DB PAYC/ MYCOGEN/ DEKALB/DK389BTY WENSMAN/W 5258 BT WENSMAN/W 588 BT DAIRYLAND/STEALTH KRUGER/ K US SEEDS/US C DEN BESTEN/DB Entries tested one year TOP FARM/TFSX DEKALB/DKC DEKALB/DKC GARST /88 IT ASGROW/RX393YG KRUGER/EX-87BT EPLEY /El EPLEY /E 23 4 KALTENBERG/K KAYSTAR/X

18 Table (continued) Stk.Ldg. Yield - bu/a Grain Bushel Green- below (5. 5% moi st) moi st weight snap ear Brand I Hybrid 2-yr 2 pct lb pct pct NC+/ GOLD COU NTRY/ MUSTANG/4BT KRUGER/ EX DENBESTEN/DB285BT MYCOGEN/2249 IMI DAIRYLAND/STEALTH DAH LCO/X DAHLC/ KALTENBERG/K2727BT 2 4 SEEDS 2/2942BT 9 22 TOP FARM/TFSX 79BT 8 5 MALLARD/U C-X US SEEDS/US E GOLD COUNTRY/ GOLD COUNTRY/ DENBESTEN/DB29 BT 89 5 DAKOTA/TR Test average : LSD (5%) value : Min. top-yield value* : 5 5 Coef. of variation# : 8 * Top yield - within one LSD value of highest yield. # Measure of experimental error : values of < 5% are desired

19 Table 2. Watertown late corn hybrid results, 999-2, NE Research Farm. Test relative maturity is 96-day or more Stk.Ldg. Yield - bu/a Grain Bushel Green below (5. 5% moist) moist weight snap ear Brand I Hybrid 2-yr 2 pct lb pct pct Entries tested two years US SEEDS/US C MYCOGEN/ KRUGER/ K-993BT DEKALB/DK MYCOGEN/ KRUGER/ K-92BT SEEDS 2/ WENSMAN/W 5329 BT DENBESTEN/DB292BT KRUGER/EX DENBESTEN/DB SEEDS 2/32BT LG SEEDS/LG TOP FARM/TFSX EPLEY /E EPLEY/E47 BT DENBESTEN/DB DENBESTEN/DB295BT WENSMAN/W 539 BT DEKALB/DKC46-26 Entries tested one year KALTENBERG/K GARST /8766 IT 2 8 US SEEDS/US E MYCOGEN/2544IMI 2 5 KRUGER/ K-982BT EPLEY/E KALTENBERG/K DAHLC/ KRUGER/K

20 Table 2 (continued) Stk.Ldg. Yield - bu/a Grain Bushel Green- below (5.5% moist) moist weight snap ear Brand I Hybrid 2-yr 2 pct lb pct pct LG SEEDS/LG MALLARD/U C-X DEKALB/DKC MUSTANG/ GARST/879BT DEKALB/DKC KALTENBERG/K4848BT ASGROW/RX452YG DAIRYLAND/STEALTH-496B KAYSTAR/X DENBESTEN/DB299BT KRUGER/ K SEEDS 2/ MUSTANG/ TOP FARM/TFSX TOP FARM/TFSX KRUGER/K TOP FARM/TFSX 796BT 9 5 SEEDS 2/295BT KRUGER/K Test average : LSD (5%) value: Min. top-yield value* : 3 Coef. of variation# : 8 6 * Top yield - within one LSD value of highest yield. # Measure of experimental error : values of < 5% are desired

21 Table 3. Frankfort no-till early corn hybrid results, 999-2, Steve Masat farm. Test relative maturity is -day or less Stk.Ldg. Yield - bu/a Grain Bushel Green below ( 5._5% moist) moist weight snap ear Brand I Hybrid 2-yr 2 pct lb pct pct Entries tested two years SEEDS 2/ KRUGER/ K-982A MUSTANG/ KRUGER/ K MYCOGEN/ KRUGER/K-92BT WENSMAN/MAX WENSMAN/W 5258 BT DENBESTEN/DB DENBESTEN/DB US SEEDS/US Cl WENSMAN/MAX Entries tested one year KRUGER/ K DEKALB/DKC ASGROW/RX393YG KAYSTAR/X DEKALB/DKC KRUGER/ K-982BT GARST/879 BT ASGROW/RX452YG TOP FARM/TFSX LG SEEDS/LG DEKALB/DKC GARST /8766IT 62 8 DEKALB/DKC SEEDS 2/ DAIRYLAND/STEALTH US SEEDS/US E KRUGER/EX-87BT US SEEDS/US C GARST /88 IT DAI RYLAND/STEALTH

22 Table 3 (continued) St k.ldg. Yield - bu/a Grain Bushel Green- bel ow (5.5% moist) moist weight snap ear Brand I Hybrid 2-yr 2 pct lb pct pct MYCOGEN/2544IMI SEEDS 2/2942BT NC+/ DAIRYLAND/STEALTH-4 B DENBESTEN/DB285BT 5 4 US SEEDS/US C DEKALB/DKC WENSMAN/W 539 BT WENSMAN/W 5329 BT CARGILL/252 BT 7 8 DENBESTEN/DB299BT DENBESTEN/DB29BT KRUGER/K SEEDS 2/295BT 5 55 TOP FARM/TFSX 796 BT Test average : LSD (5%) value : Min. top-yield value* : 68 Coef. of variation# : 8 7 * Top yield - within one LSD value of highest yiel d. - Rankings of hybrid yields in 999 were so different from those in 2 that two-year hybrid yield differences could not be detected. # Measure of experimental error : values of < 5% are desired

23 Table 4. Frankfort no-till late corn hybrid results, 999-2, Steve Masat farm. Test relative maturity is -day or more Stk.Ldg. Yield - bu/a Grain Bushel Green below (5.-5% moist) moist weight snap ear Brand I Hybrid 2-yr 2 pct b pct pct Entries tested two years KRUGER/ K MYCOGEN/ SEEDS 2/32BT DENBESTEN/DB292BT DENBESTEN/DB CARGILL/42 BT DENBESTEN/DB DENBESTEN/DB295BT TOP FARM/TFSX 5BT Entries tested one year KRUGER/K DEKALB/DKC CARGILL/452 BT KAYSTAR/X GARST /N CARGI LL/388 BT DEKALB/DKC DENBESTEN/DB GARST/N KRUGER/ EX KRUGER/ EX -6BT WENSMAN/W 53 BT NC+/ WENSMAN/W TOP FARM/TFSX 722BT ASGROW/RX KRUGER/K-96BT TOP FARM/TFSX KAYSTAR/KX-625BT KAYSTAR/X

24 Table 4 (continued). Brand I Hybri d Yiel d - bu/a (5.5% moist) 2-yr Stk.Ldg. Grai n Bushel Green bel ow moist wei ght snap ear pct lb pct pct ASGROW/RX58YG MUSTANG/6464 LG SEEDS/LG 252 KRUGER/K-95 MUSTANG/ US SEEDS/US Cl3 KRUGER/ EX-9 KRUGER/K-99BT GARST/ Test average : LSD (5%) value: Mi n. top-yield value* : Coef. of variat ion#: * Top yield - withi n one LSD val ue of highest yield. - Ran ki ngs of hybrid yields in 999 were so different from those in 2 that two-year hybri d yiel d differences could not be detected. NS indicates values withi n a col umn are not sign ificantly different. # Measure of experimental error : values of < 5% are desired. 2

25 Table 5. Brookings early corn hybrid results, 999-2, SDSU Agronomy Farm. Test relative maturity is -day or less Stk. Ldg. Yield - bu/a Grain Bushel Green below (5.5% moist) moist weight snap ear Brand I Hybrid 2-yr 2 pct lb pct pct KRUGER/K-993BT Entries tested two years WENSMAN/MAX MUSTANG/ SEEDS 2/ MYCOGEN/ KRUGER/ K-92BT ASGROW/RX DEKALB/DK MUSTANG/ WENSMAN/MAX DAIRYLAND/STEALTH KRUG ER/ K -982A WENSMAN/W 5258 BT US SEEDS/US Cl EPLEY /E DENBESTEN/DB TOP FARM/TFSX DENBESTEN/DB DEKALB/DKC48-83 Entries tested one year GOLD COUNTRY/X TOP FARM/TFSX DEKALB/DKC GARST /8766IT 9 6 DEKALB/DKC EPLEY /El l KALTENBERG/K MYCOGEN/2544IMI DAHLCO/X DEKALB/DKC KRUGER/ K-982BT ASGROW/RX393YG WENSMAN/W 5329 BT KRUGER/ K

26 Table 5 (continued) Stk. Ldg. Yield - bu/a Grain Bushel Green- below (5. 5% moi st) moi st wei ght snap ear Brand I Hybrid 2-yr 2 pct lb pct pct DEKALB/DKC TOP FARM/TFSX GOLD COU NTRY/X GARST/879 BT WENSMAN/W 539 BT ASGROW/RX452YG KAYSTAR/X SEEDS 2/2942BT US SEEDS/US C DAIRYLAND/STEALTH KAL TENBERG/K DENBESTEN/DB299BT SEEDS 2/ MUSTANG/4BT MALLARD/UC DAHLC/ LG SEEDS/LG 25BT TOP FARM/TFSX 796 BT KRUGER/EX-87BT 68 6 GOLD COUNTRY/ KRUGER/K SEEDS 2/295BT EPLEY /E DENBESTEN/DB285BT DENBESTEN/DB29BT Test average : LSD (5%) value : Min. top-yield value* : Coef. of variation# : 5 5 * Top yield - within one LSD value of highest yield. # Measure of experi mental error : values of < 5% are des ired. 5 23

27 Table 6. Brookings late corn hybrid results, 999-2, SDSU Agronomy Farm. Test relative maturity is -day or more Stk.Ldg. Yield - bu/a Grain Bushel Green bel ow (5. 5% moi st) moi st weight snap ear Brand I Hyb rid 2 - yr 2 pct lb pct pct Entries tested two years MYCOGEN/ KRUGER/K - 998BT KRUGER/ K - 99BT DEKALB/DK LG SEEDS/LG us SEEDS/US C29BT MYCOGEN/ MYCOGEN/ DENBESTEN/DB EPLEY/E TOP FARM/TFSX 5BT KRUGER/ K EPLEY /E5BT DENBESTEN/DB295BT EPLEY/ E47BT MYCOGEN/ DENBESTEN/DB MUSTANG/5BT SEEDS 2/32BT EPLEY /E DENBESTEN/DB292BT Entries tested one year WENSMAN/W KAYSTAR/X EPLEY/ E KAYSTAR/X KALTENBERG/K55BT KRUGER/ K KRUGER/K - 96BT KRUGER/ K - 99BT KRUGER/ EX MUSTANG/

28 Table 6 (continued) Stk. Ldg. Yield - bu/a Grain Bushel Green- below (5. 5% moist) moist weight snap ear Brand I Hybrid 2-yr 2 pct lb pct pct MALLARD/UC KRUGER/K KRUGER/K ASGROW/RX DENBESTEN/DB KALTENBERG/K GARST/N GARST /N MUSTANG/ US SEEDS/US C TOP FARM/TFSX 722BT DAHLCO/X-8 76 KAYSTAR/X WENSMAN/W 53 BT 72 2 ASGROW/RX58YG TOP FARM/TFSX Test average : LSD (5%) value: Min. top-yiel d value* : Coef. of variation# : 5 4 * Top yiel d - within one LSD value of highest yield. # Measure of experimental error : values of < 5% are desired

29 Table 7. Armour no-till early corn hybrid results, 999-2, Robert Clark farm. Test relative maturity is 5-day or less Stk.Ldg. Yield - bu/a Grain Bushel Green below (5. 5% moist) moist weight snap ear Brand I Hybrid 2 -yr 2 pct lb pct pct Entries tested two years US SEEDS/US C KRUGER/K-998BT DENBESTEN/DB HOEGEMEY ER/ HOEGEMEYER/ US SEEDS/US C29BT DENBESTEN/DB MYCOGEN/ DENBESTEN/DB292BT EPLEY/E KRUGER/ K WENSMAN/W 5329 BT EPLEY/E5 BT EPLEY /E47 BT WI LSON/ CARGILL/452 BT MYCOGEN/ JACOBSEN/JS425BT 9 5 DENBESTEN/DB295BT Entries tested one year KRUGER/K LG SEEDS/LG DEKALB/DKC JACOBSEN/JS SEEDS 2/X36BT 46 6 DAIRYLAND/STEALTH KRUGER/ K-99BT KRUGER/K-96BT DENBESTEN/DB GARST/

30 Table 7 (continued). Brand I Hybrid Yield - bu/a (5.5% moi st) 2-yr Stk.Ldg. Grain moist pct Bushel weight lb Green s nap pct below ear pct HOEGEMEYER/257 KRUGER/EX-6BT CARGIL L/532 BT JACOBSEN/JS434 ASGROW/RX58YG KRUGER/EX-9 DENBESTEN/DB299BT JACOBSEN/JS445 WENSMAN/W 4379 KAYSTAR/X WENSMAN/W 53 BT Test average : 4 9 LSD (5%) value : NS 2 Min. top-yield value* : 2 8 Coef. of variation# : * Top yield - within one LSD value of highest yiel d. NS indicates values within a column are not significantl y different. # Measure of experimental error : values of < 5% are desired. 27

31 Table 8. Armour late corn hybrid results, 999-2, Robert Clark farm. Test relative maturity is 6-day or more Stk.Ldg. Yield - bu/a Grain Bushel Green below (5.5% moist) moist weight snap ear Brand I Hybrid 2-yr 2 pct lb pct pct Entries tested two years DENBESTEN/DB292BT KRUGER/K-96 4ABT KRUGER/ K-9 BT GARST I 8 IT EPLEY/E EPLEY/E JACOBSEN/JS4785BT SANDS/SOI EPLEY/E36 BT DENBESTEN/DB WI LSON/ MYCOGEN/ KRUGER/ K-94BT WI LSON/ JACOBSEN/JS KAYSTAR/KX MYCOGEN/ HOEGEMEYER/ CA RGI LL/652 BT MYCOGEN/ US SEEDS/US C DENBESTEN/DB2 BT EPLEY/E US SEEDS/US C9BT Entries tested one year KRUGER/K KRUGER/K ASGROW/RX HOEGEMEY ER/ KRUGER/EX - lllbt KRUGER/K-9 +BT CARGILL/692 BT KRUGER/K-9 4BT KRUGER/K-96 4B GARST/853 BT

32 Table 8 (continued) Stk.Ldg. Yield - bu/a Grai n Bushel Green- below (5.5% moist) moist wei ght snap ear Brand I Hybrid 2-yr 2 pct lb pct pct DENBESTEN/DB WI LSON/E EPLEY/E MY COGEN I 277! MI JACOBSEN/JS4645BT KRUGER/K KRUGER/K JACOBSEN/JS4685BT WILSON/E953BT JACOBSEN/JS WI LSON/475PT DENBESTEN/DB KRUGER/K GARST/N9525BT DAIRY LAND/STEALTH KRUGER/K-9BT DEKALB/DKC KAYSTAR/X MYCOGEN/2722IMI DAIRY LAND/STEALTH JACOBSEN/JS HOEGEMEYER/ MYCOGEN/ LG SEEDS/LG KRUGER/ K-99BT GARST/N Test average: LSD (5%) val ue : Mi n. top-yield value* : Coef. of variation# : 7 8 * Top yield - within one LSD val ue of hig hest yield. # Measure of experimental error : values of < 5% are desired

33 Table 9. Beresford early corn hybrid results, 999-2, SE Research Farm. Test relative maturity is -day or less Stk. Ldg. Yield - bu/a Grain Bushel Green below (5. 5% moi st) moi st wei ght snap ear Brand I Hybrid 2-yr 2 pct lb pct pct Entries tested two years KRUGER/ K-9BT TOP FARM/TFSX HEI NE/H DAIRYLAND/STEALTH MYCOGEN/ DENBESTEN/DB295BT NC+/ KRUGER/K-964ABT MYCOGEN/ KRUGER/K-964A LG SEEDS/LG HE I NE/H HE I NE/H MUSTANG/ DEKALB/DK5BTY US SEEDS/US C DAI RYLAND/STEALTH TOP FARM/TFSX KALTENBERG/K MUSTANG/72 74 HOEGEMEYER/ KAYSTAR/KX WILSON/ MYCOGEN/ WENSMAN/W 53 BT TOP FARM/TFSX 5BT US SEEDS/US C9BT EPLEY/E5BT WENSMAN/W 5329 BT HOEGEMEYER/

34 Table 9 (continued) Stk. Ldg. Yield - bu/a Grai n Bushel Green- below (5.5% moi st ) moist wei ght snap ear Brand I Hybrid 2-yr 2 pct lb pct pct EPLEY /E47BT EPLEY/E WI LSON/ Entries tested one year KRUGER/K-9 2 KRUGER/K KRUGER/K-9BT DAIRYLAND/STEALTH GARST/853 BT GARST/N KRUGER/K-96 4B KRUGER/K-9 +BT 87 6 JACOBSEN/JS KRUGER/K WILSON/E KRUGER/K-99BT 79 KRUGER/ K GARST/N9525BT 7 2 WILSON/E953BT 7 6 DENBESTEN/DB29 7 HEI NE/H WENSMAN/W JACOBSEN/JS4685BT MYCOGEN/277IMI 68 6 DAHLC/ ASGROW/RX GOLD COUNTRY/X6984BT WI LSON/475PT JACOBSEN/JS4645BT

35 Table 9 (continued) Stk. Ldg. Yield - bu/a Grain Bushel Green- bel ow (5. 5% moist) moist weight snap ear Brand I Hybrid 2 -yr 2 pct lb pct pct ASGROW/RX58YG JACOBSEN/JS MUSTANG/ GOLD COUNTRY/X GARST/N TOP FARM/TFSX 722BT 57 2 DEN BESTEN/DB MUSTANG/75BT DEKALB/DKC HOEGEMEYER/ KALTENBERG/K KRUGER/K-9 54 GOLD COUNTRY/X US SEEDS/US Cl DAHLCO/X JACOBSEN/JS Test average : LSD (5%) value : Min. top-yield value* : Coef. of variati on# : 8 8 * Top yield - within one LSD value of highest yield. # Measure of experi mental error : values of < 5% are desired. 32

36 Table. Beresford late corn hybrid results, 999-2, SE Research Farm. Test relative maturity is -day or more Stk.Ldg. Yield - bu/a Grain Bushel Green below (5.5% moist) moist weight snap ear Brand I Hybrid 2-yr 2 pct lb pct pct Entries tested two years KRUGER/ K-9 4BT 85 2 MYCOGEN/2799IMI HE I NE/H DENBESTEN/DB292BT EPLEY/E36 BT SANDS/SOI EPLEY/E WI LSON/ DENBESTEN/DB2 BT 8 4 HOEGEMEYER/ HE I NE/H DENBESTEN/DB EPLEY/E JACOBSEN/JS MYCOGEN/ Entries tested one year KRUGER/K MYCOGEN/ MYCOGEN/2722IMI DENBESTEN/DB KRUGER/ K-95A 92 4 NC+/4649B 92 4 KAYSTAR/KX DENBESTEN/DB GARST/ KRUGER/K HOEGEMEYER/ KRUGER/K HOEGEMEYER/ ASGROW/RX73YG JACOBSEN/JS4785BT

37 Table (continued) Stk.Ldg. Yield - bu/a Grain Bushel Green - bel ow (5.5% moist) moist weight snap ear Brand I Hybrid 2-yr 2 pct lb pct pct GARST 7477 IT MYCOGEN/ KAYSTAR/X2 75 HEI NE/H HEI NE/H HE I NE/H Test average : LSD (5%) value : 6 9 Min. top-yield value* : Coef. of variation#: 7 6 * Top yield - within one LSD value of highest yield. # Measure of experimental error : values of < 5% are desired. 34

38 Table. Brookings Roundup Ready early corn hybrid results, 999-2, SDSU Agronomy Farm. Test relative maturity is -day or less. Brand I Hybrid Yield - bu/a (5.5% moi st) 2- yr Stk.Ldg. Grain Bushel Green below moi st wei ght snap ear pct lb pct pct KAYSTAR KX- 62RR MUSTANG 52RR SEEDS 2 32RR DENBESTEN DB22RR EPLEY E - 485RR KRUGER K - 92RR KAYSTAR KX-57RR MUSTANG 42RR TOP FARM TFSX 82 RR US SEEDS US E98RR Entri es tested two years Entri es tested one year KRUGER K -999RRBT ASGROW RX489RR SEEDS RR/BT DENBESTEN DB295RR DAHLCO KRUGER K -999RR TOP FARM TFSX 8RR US SEEDS US C9RR DAHLCO 2475RR Test average : 47 LSD (5%) value : NS Min. top -yi eld value* : 44 Coef. of variation# : * Top yi eld - within one LSD value of highest yi eld. NS indicates values within a column are not significantly different. # Measure of experimental error : values of < 5% are desired. 35

39 Table 2. Brookings Roundup Ready late corn hybrid results, 999-2, SDSU Agronomy Farm. Test relative maturity is -day or more. Brand I Hybrid Yield - bu/a (5.5% moist) 2-yr Stk. Ldg. Grain Bushel Green below moist weight snap ear pct lb pct pct MUSTANG 65RR DENBESTEN DB2 2RR TOP FARM TFSX 85RR SEEDS 2 34RR KRUGER K-99RRBT DENBESTEN DB24RR EPLEY E-55RR 7 64 Entri es tested two years Entri es tested one year KAYSTAR KX-77 RR DENBESTEN DB25RR KRUGER EX-2RR KRUGER K-992RR EPLEY E36 5RR EPLEY E-4R85BT DENBESTEN DB22RRBT JACOBSEN J4256RR US SEEDS US El4RR Test average : 67 LSD (5%) value : NS Min. top-yield value* : 64 Coef. of variation#: * Top yield - within one LSD value of highest yield. NS indicates values within a column are not significantly different. # Measure of experimental error : values of < 5% are desired. 36

40 Table. Beresford Roundup Ready corn hybrid results, 999-2, SE Research Farm. Test relative maturity is -day or less. Brand I Hybrid Stk. Ldg. Yield - bu/a Grain Bushel Green below (5.5% moi st ) moist weight snap 2 - ear yr 2 pct lb pct pct MUSTANG 65RR ASGROW RX6RR/YG DENBESTEN DB22RR KAYSTAR KX-77RR JACOBSEN J4753RR Entries tested two years JACOBSEN J4655RR US SEEDS US C9RR US SEEDS US C9RR US SEEDS US C79RR SEEDS 2 X39RR KRUGER K -99 3RRBT KRUGER K - 92RR KAYSTAR KX RR KRUGER EX- 2RR Entries tested one year DENBEST EN DB22RRBT EPLEY E - 4R85BT EPLEY E - 485RR EPLEY E - 55RR US SEEDS US E9RR EPLEY E365RR KRUGER K - 992RR DENBESTEN DB24RR DENBESTEN DB2 5RR KRUGER K -999RRBT ASGROW RX2RR TOP FARM TFSX 85RR Test average : LSD ( 5%) v a ue: NS 27 Min. top-yi el d val ue*: 5 63 Coef. of variation# : 58 2 * Top yi el d - within one LSD val ue of highest yi eld. NS indicates val ues within a col umn are not significantly different. # Measure of experimental error: val ues of < 5% are desi red. 37