2017 Southern Illinois Corn Planting Date Study
The purpose of this study is to determine the optimum planting date window by planting on multiple dates throughout the growing season.
The earlier planting dates in this study resulted in the highest yield. Why? When we plant early, the corn is typically able to pollinate before the extreme heat of the summer hits. This year, hot, dry conditions began in June and continued through September. The earlier planting dates of March 24 and April 15 were able to beat the heat and had adequate moisture throughout the season. The April 25 planting date faced cool, wet conditions after planting which resulted in a reduction in stand and final yield.
4-YEAR OPTIMUM PLANTING DATE WINDOW
2017 EMERGENCE TIMING YIELD AVERAGE
Planted Various | Harvested Various | Population 34,000 Seeds/A. | Row Width 30 in. | Previous Crop Soybeans | Tillage Fall: Vertical-Till/In-Line Rip, Spring: Vertical-Till | Herbicides Pre: 3.5 oz. Corvus®, 1 qt. Atrazine, 1 qt. Roundup PowerMAX® Post: 3 oz. Capreno®, 1 qt. Roundup PowerMAX® | Insecticides Escalate™ | Starter 10 gal. 28-0-0 2x2 | Total Nitrogen 190 Units as UAN | Brand 6225HR™* | Soil Type Ebbert (Silt Loam) | Soil Test Values pH 6.9, O.M. % 2.2, CEC 7.1 | Percent Base Saturation Ca 70, Mg 26.8, K 1.7, H 1.5 | Parts Per Million P 11, K 46, S 6, Zn 1.9, Mn 53, B 0.2
*®XL, Optimum, and AcreMax are registered trademarks of Pioneer. XL® brand seed is distributed by Beck’s Superior Hybrids, Inc.