2017 Indiana 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.
Excessive rain in 2017 caused anaerobic soil conditions from late April through early May, which was not conducive to optimal early corn development. This, combined with a cool, relatively stress free summer, skewed this year’s optimum planting date when compared to past year’s data. It also resulted in the May 30 planting date providing the highest yields. Every year is unique, and this is a prime example of why next year’s management decisions should not be made off of one year’s worth of data. Instead, multi-year data that includes various weather patterns and environmental conditions should be used to identify the optimum planting window for your area. More times than not, the increased sunlight capture from a longer growing season and the decreased likelihood of hot, droughty conditions during pollination give an advantage to early planting. The 17-year dataset from this location suggests that the optimum window to plant corn is from April 16 to April 30.
17-YEAR OPTIMUM PLANTING DATE WINDOW
Planted Various | Harvested Various | Population 34,000 Seeds/A. | Row Width 30 in. | Previous Crop Soybeans | Tillage Fall: Disk-Rip, Spring: Field Cultivation | Herbicides 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 Crosby (Silt Loam) | Soil Test Values pH 6.6, O.M. % 2.6, CEC 11.7 | Percent Base Saturation Ca 70.6, Mg 16, K 3.1, H 10.3 | Parts Per Million P 47, K 142, S 6, Zn 2, Mn 42, B 0.3