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Hybrid perfomance in Southwestern/West Central/Central Ohio.

Hybrid perfomance in Northwestern Ohio.

Hybrid perfomance in North Central and Northeastern Ohio.

Combined Regional Summary of hybrid performance.

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Selecting Corn Hybrids for 2018

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Ohio Crop Performance Trials

2018 OHIO CORN PERFORMANCE TEST

R.J. Minyo, A.B. Geyer, P.R. Thomison, Horticulture & Crop Science,
D.G. Lohnes, Information Technology
Ohio State University Extension/Ohio Agricultural Research & Development Center

Department of Horticulture and Crop Science Series 215, Ohio State University, Columbus, OH.

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 2018, 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 fungicides were applied according to recommended cultural practices for obtaining optimum grain yields. Details concerning the establishment and management of each 2018 test are listed in footnotes below the tables.

SITE INFORMATION

Soil test results will be posted when available.

SITE BUCYRUS WOOSTER BELOIT
SOIL TYPE LURAY SILTY CLAY LOAM CANFIELD SILT LOAM BOGART SILT LOAM
SOIL TEST (pH,P,K) 6.9, 52, 288 5.8, 96, 326 6.0, 108, 240 
PREVIOUS CROP SOYBEANS SOYBEANS SOYBEANS
PLANTING /HARVEST DATES MAY 11 / OCT 24 MAY 12 / OCT 18 MAY 26 / OCT 17
TILLAGE MINIMUM TILL MINIMUM TILL MINIMUM TILL
FERTILIZER  (N,P,K) 207, 26, 120 207, 26, 0 224, 104, 90
FUNGICIDE      
COOPERATOR CRAWFORD COUNTY EXTENSION MIKE SWORD/KEN SCAIFE, OARDC B & B FARMS
COUNTY CRAWFORD WAYNE MAHONING
     
SITE HEBRON HOYTVILLE UPPER SANDUSKY
SOIL TYPE LURAY SILTY CLAY LOAM HOYTVILLE CLAY BLOUNT SILT LOAM
SOIL TEST (pH,P,K) 6.4, 68, 236 6.5, 142, 384 6.0, 100, 346
PREVIOUS CROP CORN SOYBEANS SOYBEANS
PLANTING /HARVEST DATES MAY 8 / OCT 14 MAY 24 / 0CT 25 MAY 11 / NOV 8
TILLAGE MINIMUM TILL STALE SEED BED MINIMUM TILL
FERTILIZER  (N,P,K) 298, 26, 120, 36S 222, 26, 0 224, 104, 90
FUNGICIDE YES NO YES
COOPERATOR PARRISH FARMS MATT DAVIS,  OARDC LARRY ROSS
COUNTY LICKING 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) 5.8, 150, 382  6.3, 82, 338 6.8, 132, 330 
PREVIOUS CROP SOYBEANS SOYBEANS WHEAT
PLANTING /HARVEST DATES MAY 15 / OCT 10 MAY 8 / OCT 5 MAY 9 / OCT 23
TILLAGE MINIMUM TILL MINIMUM TILL STALE SEEDBED
FERTILIZER  (N,P,K) 210, 49, 39 237, 169, 180 207, 26, 0
FUNGICIDE YES YES YES
COOPERATOR JOE DAVLIN, OARDC SOLLARS FARM STUMP FARMS
COUNTY CLARK FAYETTE DARKE
     
SITE VAN WERT    
SOIL TYPE ELLIOT SILT LOAM    
SOIL TEST (pH,P,K) 5.4, 38, 248    
PREVIOUS CROP SOYBEANS    
PLANTING /HARVEST DATES MAY 19 / OCT 12    
TILLAGE FALL STRIP TILL    
FERTILIZER  (N,P,K) 217, 26, 150    
FUNGICIDE NO    
COOPERATOR NICK WILLIAMS FARMS    
COUNTY VAN WERT    

Soil Test / Fertilizer (N) P & K 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 seed planted, and was reported as a percentage of the seeds 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 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.

2018 GROWING CONDITIONS

Growing conditions were very favorable for corn production across most of Ohio in 2018. The growing season was characterized by well above average rainfall and heat unit accumulation (growing degree-days). Precipitation and heat unit accumulation were generally greater at OCPT sites in the SW/WC/C region (with rainfall ranging from 23.3 to 26.3 inches and heat unit accumulation ranging from 3270 to 3520 GDDs) than at sites in the NW and NC/NE regions. Moreover, rainfall was generally well distributed at these sites. The impact of dry conditions in July and August on crop performance at the Van Wert and Hoytville sites in NW Ohio and the Wooster and Beloit sites in NE/NC Ohio were mitigated by timely rains in late August and September. Due to the warm, wet conditions, foliar diseases (primarily gray leaf spot) and ear rots (primarily Gibberella and Diplodia ear rots) were present at nearly all tests. However, the severity of the disease pressure was variable and it was usually most pronounced for a limited number of hybrids. Stalk lodging was evident mostly in the NW and NE/NC test sites but negligible for most of the hybrids evaluated. Warm temperatures in August through mid-October promoted crop maturation and dry down but persistent rains in September through November slowed harvest.

RESULTS

Results of the 2018 testing program are presented in Tables 1 to 10. The seed source and table location for hybrids tested in 2018 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.

Averaged across hybrid entries in the early and full season tests, yields were 273 bu/A in the Southwestern/West Central/Central region, 238 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 203 bu/A at Beloit to 285 bu/A at Greenville. Performance data for Upper Sandusky in the NW region is not presented due to variable field conditions that resulted in erratic stands, uneven growth and inconsistent yields.

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 six and nine locations in 2018 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.

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. Roger Rennekamp, Director, OSU Extension. TDD No. 800-589-8292 (Ohio only) or 614-292-1868

Acknowledgments: We thank our farmer cooperators for their contributions to the 2018 corn hybrid testing program. We are grateful for the assistance provided by 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 Kimberly Wintringham, Amanda Lukacsko and Greg Bonnell in CFAES Marketing and Communications for their assistance in preparing the test results for publication.