Northern Research and Demonstration Farm
This project was designed to study the N fertilization needs in continuous corn (CC) and corn rotated with soybean (CS) as influenced by location and climate. Multiple rates of fertilizer N were spring applied, with the intent to measure yield response to N within each rotation on a yearly basis for multiple years at multiple sites across Iowa. This will allow determination of N requirements for each rotation, differences that exist between the two rotations, responses to applied N across different soils and climatic conditions, and evaluation of tools used to adjust N application.
Sawyer, John and Barker, Daniel
"Seasonal and Rotational Influences
on Corn Nitrogen Fertilization in Northern Iowa,"
Farm Progress Reports: Vol. 2016
, Article 100.
Available at: https://lib.dr.iastate.edu/farmprogressreports/vol2016/iss1/100