Nutrient Topics
Questions? Contact John Sawyer Professor Antonio Mallarino Professor,
Soil Fertility |
Soil Fertility Home PageWelcome 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. Current TopicAPPLY NITROGEN OR PLANT CORNJohn Sawyer, Professor, Department of Agronomy, Iowa State University The end of the optimal time for corn planting is quickly approaching. Getting corn planted should be a priority over making nitrogen (N) fertilizer applications. However, along with that decision there should be a plan to get N applications completed after planting and crop emergence. Switching products and application from preplant to sidedress requires availability of needed fertilizers and equipment. So have a plan in place. Read on.
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Iron chlorosis symptom - soybean. Photo © John E. Sawyer |
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Soil Fertility, John Sawyer, Department of Agronomy, 2104 Agronomy Hall, Iowa State University, Ames, IA 50011
Phone: (515) 294-7078, Email: jsawyer@iastate.edu
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