![sawyer_john-x2](https://www.agron.iastate.edu/files/2022/02/sawyer_john-x2.jpg)
Emeritus Professor
Dr.
John
E
Sawyer
Office:
2104 Agronomy Hall, 716 Farm House Ln
2104 Agronomy Hall, 716 Farm House Ln
Email:
jsawyer@iastate.edu
jsawyer@iastate.edu
![sawyer_john-x2](https://www.agron.iastate.edu/files/2022/02/sawyer_john-x2.jpg)
Emeritus Professor
Dr.
John
E
Sawyer
Office:
2104 Agronomy Hall, 716 Farm House Ln
2104 Agronomy Hall, 716 Farm House Ln
Email:
jsawyer@iastate.edu
jsawyer@iastate.edu
About
Dr. Sawyer is a retired professor and extension soil fertility specialist in the Department of Agronomy at Iowa State University. He provided statewide leadership for extension soil fertility and nutrient management programs in Iowa. His research focus was the study of nutrients in soils and plants, and fertilizer and manure nutrient management related to crop production and the environment.