2017 Central 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.
Our 13-year data shows a strong advantage to planting between April 16 and April 30, as this appears to be the sweet spot for central Illinois. Unique environmental factors can affect the results of a study any given year, and 2017 is great example. We experienced cool temperatures this summer, specifically during late July when heat and dr ought stress typically wreak havoc on pollination. Because of this, we observed abnormal yield levels in the later planting dates. This is a perfect example of the value of multi-year data when making management decisions such as when to start planting corn.
13-YEAR OPTIMUM PLANTING DATE WINDOW
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: 1 qt. Atrazine, 3.5 oz. Corvus® Post: 3 oz. Capreno®, 1 qt. Atrazine, 1 qt. Roundup PowerMAX® | Insecticides Escalate™ | Starter 10 gal. 28-0-0 2x2 | Total Nitrogen 190 Units as UAN | Brand 5829A4 | Soil Type Sable (Silty Clay Loam) | Soil Test Values pH 6, O.M. % 4.3, CEC 17 | Percent Base Saturation Ca 63.2, Mg 13.2, K 2.4, H 21.2 | Parts Per Million P 37, K 157, S 5, Zn 2.1, Mn 35, B 0.4