Skip to content

Soil Fertility Research

Nitrogen management practice effect on tile drainage water quality.

Long-term N fertilization rate and crop rotation effect on corn and soybean production.

Modeling corn yield response to N rate.

Corn nitrogen rate response comparison between tilled and no-till systems.

Surrogate measurement methods for nitrate-N loss in tile drainage.

Integrating rye seed production and red clover cover into corn production systems and nitrogen management.

Sulfur product evaluation and soil sulfur mineralization.

Project End Date: August 23, 2018
Principal Investigators
Sawyer, John
Office:
3208 Agronomy 716 Farm House Ln
Phone:
(515) 294-7078
Email:
jsawyer@iastate.edu