605-394-1722
SDSU West River Research and Extension
711 N Creek Drive
Rapid City, SD 57703
Clarence supports the citizens of South Dakota in his role as an SDSU Extension Agronomy Field Specialist based in Rapid City.
Clarence Winter
SDSU Extension Agronomy Field Specialist
Also by Clarence Winter
Sunflower Production: Late-Season Weed Escapes Should Guide Future Weed Management Plans
Many sunflower fields across the state are far enough along in their development that the window for preventing weeds with residual herbicides has passed. Weed escapes that remain in the field through the remainder of the growing season can contribute seed back to the soil seedbank.
SDSU Extension invites public to free spring wheat field tours
June 22, 2026
South Dakota State University Extension invites all wheat producers, agronomists and agricultural professionals to attend the upcoming Spring Wheat Variety Tours on June 29, 2026.
SDSU Extension invites public to free Winter Wheat field tours
June 04, 2026
South Dakota State University Extension invites all wheat producers, agronomists and agricultural professionals to attend the upcoming Winter Wheat Variety Tours on June 9, 2026.