Soil Fertility

Soil Fertility Home Page

Welcome to the Iowa State University Agronomy Extension Soil Fertility Home Page. Nutrient topics are listed on the left side. Simply click on a topic of interest and you can find information about that topic, including Extension publications, newsletter articles, conference proceedings and reports, presentations, and links to other related sites. Links also provide access to soil fertility decision aid tools, a photo gallery, and the ISU Soil and Plant Analysis Laboratory.

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Corn Nitrogen Rate Calculator Updated

John Sawyer, Professor, Department of Agronomy, Iowa State University
July 21, 2008

What is the Corn Nitrogen Rate Calculator?
The Corn Nitrogen Rate Calculator Web tool is a resource that aids nitrogen (N) rate decisions for corn production and is helpful in determining the effect of fertilizer and corn price on application rates. The method for calculating suggested N rates is based on a regional (Corn Belt) approach to N rate guidelines. Details on the approach are provided in the regional publication Concepts and Rationale for Regional Nitrogen Rate Guidelines for Corn. This approach has been implemented by several states across the Midwest. Read on.

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Compendium of Nontraditional Materials

North Central Extension-Industry Soil Fertility Conf. Proceedings