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Soil Fertility

Questions? Contact John Sawyer

Professor
Extension Soil Fertility Specialist
Phone: (515) 294-7078
Email: jsawyer@iastate.edu

Antonio Mallarino

Professor, Soil Fertility
Phone: (515) 294-6200
Fax: (515) 294-2458
Email: apmallar@iastate.edu

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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Current Topic

PROPER SOIL SAMPLING CAN LEAD TO BETTER YIELDS AND PROFITS

Antonio Mallarino, Professor, Department of Agronomy, Iowa State University
February 3, 2017

New ISU Extension and Outreach publication discusses steps to take to get a good soil sample

The most important piece in understanding the fertility makeup of a field is collecting soil samples. Without correctly sampled soil, farmers cannot make informed decisions on fertilizer, manure nutrients, and limestone applications in those fields. Read on.


Past Current Topics

 

DO YOU KNOW THE STORY OF SOIL?

Click here to view pdf file
Click on one of the three images below to view video:

Do you know The Story of Soil? Human Health Food Quality Water

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Iron chlorosis symptom - soybean. Photo © John E. Sawyer

Iron chlorosis symptom - soybean. Photo © John E. Sawyer

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