McNay Memorial Research and Demonstration Farm

Seasonal and Rotational Influences on Corn Nitrogen Fertilization in South Central Iowa

Authors: John E. Sawyer (Iowa State University) , Daniel Barker (Iowa State University)

Abstract

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.

Keywords:

How to Cite: Sawyer, J. E. & Barker, D. (2017) “Seasonal and Rotational Influences on Corn Nitrogen Fertilization in South Central Iowa”, Iowa State University Research and Demonstration Farms Progress Reports. 2016(1).