Skip to main content

About John E. Sawyer

John Sawyer coordinates and provides leadership for Extension soil fertility and nutrient management programs to support production of agronomic crops in Iowa. Studies the chemistry of plant nutrients in soils, nutrient management, and implications of soil management related to soil fertility, tillage, and the environment. Conducts applied research related to efficient fertilizer use and nutrient, manure, and limestone management. 


Present Professor, Iowa State University Department of Agronomy

Enter a valid date range.

Enter a valid date range.

Contact Information

3208 Agronomy
716 Farm House Ln
Ames, IA 50011-1051
Phone: 515-294-7078
Fax: 515-294-3163


Peer-Reviewed Articles (42)