Factors Impacting Yield of Irrigated Corn in Arkansas.

Field trials were conducted during the 2013 and 2014 growing seasons to evaluate factors that impact corn yields of irrigated corn in Arkansas.  Trials were located in the Mississippi river delta region of eastern Arkansas near Marianna and Rohwer.   Factors evaluated included deep tillage, increased plant populations, starter fertilizer, additional fertilizer beyond normal recommendations, foliar fungicides, and enhanced seed insecticide treatment rates.  All factors were evaluated individually and then a treatment was included which evaluated all factors together into a single treatment compared to normal extension recommendations for corn production.   Several factors increased corn yields individually including additional fertilizer, foliar fungicides, deep tillage, higher plant populations, but when all the factors were combined together, yields were increased greater than any single factor did.