2020 Ohio Corn Performance Test
2020 OHIO CORN PERFORMANCE TEST
R.J. Minyo, A.B. Geyer, P.R. Thomison (Professor Emeritus), Horticulture & Crop Science
and D.G. Lohnes, Information Technology
Ohio State University Extension/Ohio Agricultural Research & Development Center
The purpose of the Ohio Corn Performance Test (OCPT) is to evaluate corn hybrids for grain yield and other important agronomic characteristics. Results of the test can assist farmers in selecting hybrids best suited to their farming operations and production environments. Corn hybrids differ considerably in yield potential, standability, maturity, and other agronomic characteristics that affect profitable crop production. Hybrid selection should be based on proven performance from multiple test locations and years. The presentation of data does not imply endorsement of any hybrid by The Ohio State University.
EVALUATION PROCEDURES
Seed companies marketing corn hybrids in Ohio are invited to enter hybrids in the test. An entry fee is charged to cover expenses. In 2020, companies were permitted to enter an unlimited number of hybrids. Ten sites were available for hybrid evaluation. Testing was available in three regions of Ohio (Southwestern/West Central/Central; Northwestern; North Central/ Northeastern). Companies were required to enter a hybrid at all the sites within a testing region. Each hybrid entry was evaluated using three replications per site in a randomized complete block design. Hybrids were planted either in an early or full season maturity trial based on relative maturity information provided by the companies. In the Southwestern/West Central/Central region, the relative maturity of hybrid entries in the early maturity trial was 111 days or earlier; the relative maturity of hybrid entries in the full season trial was 112 days or later. In the Northwestern and North Central/Northeastern regions, the relative maturity of hybrid entries in the early maturity trial was 108 days or earlier; the relative maturity of hybrid entries in the full season trial was 109 days or later. Hybrids were planted with an Almaco Seed Pro 360 plot planter with SkyTrip GPS. Each plot consisted of four 30-inch rows approximately 25 feet long. Force 3G soil insecticide was applied in a T-band to all plots. Seed companies selected a final stand and percent overplant for each hybrid entered. Fertilizer, herbicides, insecticides and foliar fungicides were applied according to recommended cultural practices for obtaining optimum grain yields. Details concerning the establishment and management of each 2020 test are listed in footnotes below the tables.
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SITE INFORMATION |
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| SITE | BUCYRUS | WOOSTER | COLUMBIANA |
| SOIL TYPE | BLOUNT SILT LOAM | CANFIELD SILT LOAM | CANFIELD SILT LOAM |
| SOIL TEST (pH,P,K) | 6.6, 14, 98 | 6.5, 40, 128 | 7.4, 73, 150 |
| PREVIOUS CROP | SOYBEANS | SOYBEANS | DOUBLE CROP SOYBEANS |
| PLANTING /HARVEST DATES | MAY 27 / NOV 18 | JUNE 6 / NOV 20 | MAY 20/ NOV 6 |
| TILLAGE | MINIMUM TILL | MINIMUM TILL | MINIMUM TILL |
| FERTILIZER (N,P,K) | 210, 26, 120, 6S | 225, 66, 102, 6S | 205, 26, 112, 6S |
| COOPERATOR | CRAWFORD COUNTY EXTENSION | MIKE SWORD / KEN SCAIFE, OARDC | MYRON WEHR |
| FUNGICIDE | |||
| COUNTY | CRAWFORD | WAYNE | COLUMBIANA |
| SITE | VAN WERT | HOYTVILLE | UPPER SANDUSKY |
| SOIL TYPE | BLOUNT SILT LOAM | HOYTVILLE CLAY | BLOUNT SILT LOAM |
| SOIL TEST (pH,P,K) | 5.7, 34, 136 | 6.7, 61, 184 | 5.8, 33, 145 |
| PREVIOUS CROP | SOYBEANS | SOYBEANS | SOYBEANS |
| PLANTING /HARVEST DATES | MAY 27 / NOV 5 | JUNE 1 / NOV 17 | JUNE 1 / NOV 19 |
| TILLAGE | FALL STRIP TILL | STALE SEEDBED | MINIMUM TILL |
| FERTILIZER (N,P,K) | 227, 26, 180, 6S | 210, 26, 0, 6S | 224, 104, 90, 6S |
| FUNGICIDE | NO | NO | NO |
| COOPERATOR | NICK WILLIAMS FARM | MATT DAVIS, OARDC | LARRY ROSS FARM |
| COUNTY | VAN WERT | WOOD | WYANDOT |
| SITE | SOUTH CHARLESTON | WASHINGTON C.H. | GREENVILLE |
| SOIL TYPE | KOKOMO SILT LOAM | PATTON SILTY CLAY LOAM | CROSBY SILT LOAM |
| SOIL TEST (pH,P,K) | 5.7, 53, 150 | 6.0, 41, 152 | 6.0, 128, 212 |
| PREVIOUS CROP | SOYBEANS | SOYBEANS | WHEAT |
| PLANTING /HARVEST DATES | JUNE 2 / NOV 9 | MAY 30 / NOV 12 | MAY 13/ OCT 26 |
| TILLAGE | MINIMUM TILL | MINIMUM TILL | STALE SEEDBED |
| FERTILIZER (N,P,K) | 240, 26, 0, 6S | 238, 156, 180, 6S | 194, 26, 84, 6S |
| FUNGICIDE | YES | YES | YES |
| COOPERATOR | JOE DAVLIN, OARDC | SOLLARS FARM | MONTY STUMP FARM |
| COUNTY | CLARK | FAYETTE | DARKE |
| SITE | HEBRON | ||
| SOIL TYPE | LURAY SILTY CLAY LOAM | ||
| SOIL TEST (pH,P,K) | 6.6, 48, 155 | ||
| PREVIOUS CROP | CORN | ||
| PLANTING /HARVEST DATES | MAY 17 / NOV 23 | ||
| TILLAGE | MINIMUM TILL | ||
| FERTILIZER (N,P,K) | 265, 26, 120, 6S | ||
| FUNGICDE | YES | ||
| COOPERATOR | PARRISH FARMS | ||
| COUNTY | LICKING | ||
Soil Test reported as Melich3 ppm / Fertilizer N, P, K & S reported as lbs./acre.
MEASUREMENTS AND RECORDS
YIELD. The center two rows of each plot were harvested with a self propelled two row picker sheller combine. Yields were reported as bushels of grain per acre (BU/A) at 15.5 percent moisture.
MOISTURE (HARV MST). A grain moisture determination was made from each plot with an electrical conductance moisture meter. Grain moisture was reported as percent grain moisture.
LODGING (STK LDG). The number of broken stalks in each plot was determined just prior to harvest. Only those plants with a stalk broken below the ear were considered stalk lodged. Stalk lodging was reported as a percentage of final plant stand.
FINAL STAND (FINAL STD). Seed corn producers selected a desired planting rate for each hybrid entered. Differences between the planting rate and the final stand may be attributed to seed quality and/or environmental conditions present. Populations were reported in hundreds (100/A) per acre.
EMERGENCE (EMG). An emergence count was made on each plot after plant emergence. The emergence percentage was computed based on the number of plants and the number of kernels planted, and was reported as a percentage of the kernels planted.
TEST WEIGHT (TW). Test weights were recorded in pounds per bushel on grain samples at field moisture. The results are an average of all three sites in the regional tests.
LSD 0.10 - Least Significant Differences at probability level 0.10 (LSD 0.10) are reported for yield and other agronomic characteristics. Differences between hybrids are significant only if they are equal to or greater than the LSD value. If a given hybrid out yields another hybrid by as much or more than the LSD value, then we are 90% confident (i.e. the odds are 10:1) that the yield difference is real, with only a 10% probability that the difference is due to chance variation (such as soil variation, etc.). For example, if Hybrid X is 19 Bu/A higher in yield than Hybrid Y, then this difference is statistically significant if the LSD is 19 Bu/A or less. If the LSD is 20 Bu/A or greater, then we are less confident that Hybrid X is really higher yielding than Hybrid Y under conditions of the test. If ‘NS’ is indicated for a characteristic, then the differences among hybrid entries are not significant at the 10% probability level.
2020 GROWING CONDITIONS
The planting season started in mid-May with excellent soil moisture conditions in NW Ohio followed by flooding rains which reduced emergence and stands. Excessive May rainfall in Southern Ohio delayed planting until late May/early June (four of the ten OCPT test sites were planted from June 1 to June 6). Rainfall was extremely variable in June thru August with part of the state well below average. The dry weather slowed crop development, but growth resumed after the late August rain events. The weather events throughout the summer lead up to a crop that was very slow to dry down and delayed the start of harvest. Above average temperatures in November promoted the drying process and grain moistures dropped to a manageable level. The OCPT harvest started Oct. 24 and then rain/field conditions delayed harvest until Nov. 5th. Aside from two short rain delays, continued nearly every day for 2 ½ weeks concluding on Nov. 23rd. Foliar diseases (Northern Corn Leaf Blight and Gray Leaf Spot) and ear rots, including Gibberrella and Diplodia, were observed at most OCPT sites but were generally present at low to moderate levels. Foliar fungicides were applied to six of the ten OCPT fields. Stalk lodging was most pronounced at the NW (except for Van Wert) and the NE/NC test sites with site averages for lodging ranging from about 10% at the Columbiana county test site to 30% at Hoytville.
RESULTS
Results of the 2020 testing program are presented in Tables 1 to 10. The seed source and table location for hybrids tested in 2020 are shown in Table 11. The transgenic herbicide and insect resistant events and insecticide and fungicide seed treatments associated with each hybrid entry (information provided by seed companies) are indicated in Table 11. Hybrids that do not contain transgenic events are specified as “NON-GMO”. Yields and other agronomic performance characteristics have been averaged across the individual tests and shown under the SUMMARY heading for each region. Hybrids are listed in alphabetical order by brand.
Yields varied across the state depending on planting delays and rainfall patterns. Despite late planting dates and warmer and drier than normal conditions throughout most of the growing season, OCPT yields exceeded expectations. Averaged across hybrid entries in the early and full season tests, yields were 258 bu/A in the Southwestern/West Central/Central region, 209 bu/A in the Northwestern region, and 242 bu/A in the North Central/Northeastern region.Yields at individual test sites, averaged across hybrid entries in the early and full season tests, ranged from 171 bu/A at Hoytville to 272 bu/A at Washington CH, with a 294 bu/A average for the early season test at Greenville. Although stalk lodging in the Northwestern and the North Central/Northeastern regions was greater than it has been in recent years, the impact of lodging on yield appeared limited. Full season hybrid performance data for Hebron and Greenville in the Southwestern/West Central/Central region are not presented because excessive rainfall shortly after planting resulted in poor emergence and reduced stands.
Confidence in test results increases with the number of years and the number of locations in which the hybrid was tested. Table 10 presents performance data for hybrids tested at five and eight locations in 2020 and Tables 2, 3, 5, 6, 8 and 9 provide multiple year performance data. Look for consistency in a hybrid's performance across a range of environmental conditions. Yield, standability, grain moisture, and other comparisons should be made between hybrids of similar maturity to determine those best adapted to your farm.
Acknowlegements
We thank our farmer cooperators for their contributions to the 2020 corn hybrid testing program. We are grateful for the assistance provided by Matt Lowe, OSU Farm Operations -Wooster, establishing the test plots, Joe Davlin, OSU-OARDC Western Agricultural Research Station, Ken Scaife and Mike Sword, OSU-OARDC Wooster and Matt Davis, OSU-OARDC Northwest Agricultural Research Station. We thank and Greg Bonnell, Amanda Lukacsko and Bryan Harding, CFAES Communications, for their assistance in preparing the test results for publication.
All educational programs conducted by Ohio State University Extension are available to clientele on a nondiscriminatory basis without regard to race, color, creed, religion, sexual orientation, national origin, gender, age, disability or Vietnam era veteran status.
Dr. Jacqueline Wilkins, director, OSU Extension.
TDD No. 800 589 8292 (Ohio only) or 614 292 1868