Northern Research and Demonstration Farm
This experiment was established in 1963 to determine if 1) acidification of soil from nitrogen (N) fertilizer could be controlled in continuous corn with annual lime applications, 2) the amounts of phosphorus(P) and potassium (K) fertilizer needed to maintain fertility, and 3) the nutrient balances that would develop and their effects on corn production. The study used 25 treatments in an incomplete factorial design where all treatments were replicated two times.
Iowa State University
Henning, Stanley and Doorenbos, Russell, "Corn and Soil Responses to N, P, K, and Lime in Continuous Corn Production" (2008). Iowa State Research Farm Progress Reports. 760.