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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Foliar Fertilization of Corn and Soybean

John Sawyer, Professor, Department of Agronomy, Iowa State University
June 30, 2009

Just because a post herbicide application is being made to a field does not justify inclusion of a foliar fertilizer material. Remember, corn and soybean take up a large amount of N, P and K, during a growing season. This amount cannot be substituted for or compensated with a low foliar rate. Read on.

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North Central Extension-Industry Soil Fertility Conf. Proceedings