Planting Date Study

2017 Kentucky Corn Planting Date Study

  • Kentucky

The purpose of this study is to determine the optimum planting date window by planting on multiple dates throughout the growing season.

OBSERVATION

Planting early leads to more developed plants and earlier row canopy, which maximizes sunlight interception. Longer day length, particularly during grain fill, allows more energy and resources to be packed into the grain. Pollination, the stage in which corn in most vulnerable to environmental stresses, takes place during the month of July. By planting early, we can move the pollination window up to early July which, when compared to late July, is typically cooler with more available moisture. There are always exceptions, however, and this year was a perfect example. But more times than not, early planting pays. Long-term data from this site suggests that the optimum planting date window is between April 16 and April 30. 

 

13-YEAR OPTIMUM PLANTING DATE WINDOW

 

2017 RESULTS

 

STUDY INFORMATION

Planted Various | Harvested Various | Population 34,000 Seeds/A. | Row Width 30 in. | Previous Crop Soybeans |
Tillage Fall: In-Line Rip, Spring: Vertical-Till/Field Cultivation | Herbicides Pre: 3.5 oz. Corvus®, 1 lb. Atrazine Post: 3 oz. Capreno®, 1 lb. Atrazine | Insecticides Escalate | Starter 9 gal. 30-0-0 2x2 | Total Nitrogen 190 Units as UAN |
Brand 6127A3 | Soil Type Henshaw (Silt Loam) | Soil Test Values pH 6.8, O.M. % 2.4, CEC 6.4 | Percent Base Saturation Ca 74.3, Mg 19.5, K 3.2, H 3 | Parts Per Million P 25, K 80, S 4, Zn 2.9, Mn 44, B 0.2 

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