Soil Fertility
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 TopicIt's a Late Spring: Should You Apply Nitrogen or Plant Corn? John Sawyer, Professor, Department of Agronomy, Iowa State University Many areas of Iowa have wet soils and corn planting continues to be delayed. At the end of the first week in May last year we had more that 50 percent of the crop planted. Although the new report is not yet released at the time of this writing, we expect considerably less progress than that. Read on.
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Iron chlorosis symptom - soybean. Photo © John E. Sawyer ISU Soil and Plant Analysis Laboratory |
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Did you know?
In the last five years, anhydrous ammonia comprised 50 percent of nitrogen fertilizer consumed in Iowa. |
Soil Fertility, John Sawyer, Department of Agronomy, 2104 Agronomy Hall, Iowa State University, Ames, IA 50011
Phone: (515) 294-1923,
Fax: (515) 294-9985, Email: jsawyer@iastate.edu
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