Yes, supplemental irrigation is possible in Iowa - perhaps desirable for some soils. But there are a lot of things to consider before going "whole-hog" on the idea that irrigation is THE answer.
Bittinger, M. W. and Frevert, R. K.
"Irrigation in Iowa?,"
Iowa Farm Science: Vol. 6
, Article 4.
Available at: https://lib.dr.iastate.edu/farmscience/vol6/iss11/4