Armstrong Memorial Research and Demonstration Farm

Seasonal and Rotational Influences on Corn Nitrogen Requirements

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

Abstract

This project is designed to study the N fertilization needs in continuous corn and corn rotated with soybean as influenced by location and climate. Multiple rates of fertilizer N are spring applied, with the intent to measure yield response to this N within each rotation on a yearly basis for multiple years at multiple sites across Iowa. This will allow the determination of N requirements for continuous corn and rotated corn, differences that exist between the two rotations, responses to applied N across different soils and climatic trends, and evaluation of new tools for site adjustment of N application.

Keywords: Agronomy

How to Cite: Sawyer, J. E. & Barker, D. W. (2001) “Seasonal and Rotational Influences on Corn Nitrogen Requirements”, Iowa State University Research and Demonstration Farms Progress Reports. 2000(1).