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.
COMPRESSED SPRING WORKLOAD IN 2014? WHAT ARE NITROGEN
John E. Sawyer, Professor, Department of Agronomy, Iowa State
March 31, 2014
It was a long winter, with conditions this spring suitable for field work perhaps being later than
normal. Also, some areas of Iowa did not have the typical amount of fall anhydrous ammonia
applied. Questions are already coming about options for nitrogen (N) fertilization this spring, and
the usual question should time be taken to get N applied or plant corn and apply N later. Read on.
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DO YOU KNOW THE STORY OF SOIL?
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