On-Farm Corn Fertilizer Trials

Jim Fawcett, Iowa State University
Lyle Rossiter, Iowa State University
Wayne Roush, Iowa State University
Josh Sievers, Iowa State University


All cropping systems require fertilizer inputs in order to maintain crop yields. However, excess fertilizer, especially nitrogen and phosphorus, can increase problems with water quality. Starter fertilizer applied with the corn planter has been shown to sometimes increase corn yields. It is important for farmers to use the appropriate rates and methods of fertilizer application to optimize corn yields and minimize the impact on the environment.