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.
CORN NITROGEN RATE CALCULATOR UPDATE
John E. Sawyer, Professor, Department of Agronomy, Iowa State
July 21, 2014
The Iowa N response database in the Corn Nitrogen Rate Calculator was recently updated, with
response trials added from 2013 research. There are now 246 trials for corn following soybean
and 133 trials for corn following corn. Being able to easily update the database with recent data
is one of the many advantages to this dynamic database approach for corn N rate guidelines.
Having new response trial data allows rapid updating with changing hybrid genetics, rotations
and climatic conditions. Read on.
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DO YOU KNOW THE STORY OF SOIL?
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