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
SDSU Extension invites public to annual Draper Winter Wheat meeting
August 13, 2026
South Dakota State University Extension invites producers and community members to the 37th annual Winter Wheat Meeting in Draper on Aug. 27, 2026.
Aug
27
37th Annual Draper Winter Wheat Meeting
SDSU Extension will host the 37th Annual Winter Wheat Meeting on August 27, 2026 beginning at 6:30 p.m. CDT at the City of Draper Auditorium (232 Main St., Draper, SD 57531).
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.