Management Practices to Increase Irrigated Mid-South Corn Yields.

Field Trials were conducted from 2013-2017 in Eastern Arkansas near Marianna and Rohwer evaluating production practices and inputs effects on yield of irrigated field corn. Inputs evaluated included deep tillage, in-furrow starter fertilizer, increase plant populations, increased fertilizer, foliar fungicide, and micronutrients. Each of the above enhanced input levels were evaluated individually compared to current extension recommendations to access impact on yield. An additional treatment was included to evaluate impact on corn yield when all inputs were combined together. Depending on year and location, deep tillage, extra fertilizer, in-furrow starter fertilizer, and increasing plant populations tended to have the greatest increase in yield compared to current extension recommendations. In nearly all trials, corn yields were increased over current extension recommendations when all inputs were combined together, however greatest economic return generally was from current extension recommendations.