In trying to determine if it would pay Kentucky farmers to irrigate corn, one of the most important steps is to ascertain the long-time average yield increases to be expected from supplemental irrigation. The yield data reported below are the results of an experiment applicable for a fairly large group of soils occurring in Kentucky.
Ragland, John L. and Redman, J. C., "Irrigating Corn on Well-Drained, Limestone-Derived Soils" (1969). Agronomy Notes. 179.