Farmers are reminded to wait until soil temperatures remain below 50 degrees Fahrenheit before applying anhydrous ammonia (NH3) fertilizer this fall. Harvest is progressing rapidly in many parts of the state and officials with the Iowa Department of Agriculture and Land Stewardship and Iowa State University Extension and Outreach said that waiting can help reduce nitrogen loss and better protects the environment.
ISU Extension and Outreach maintains a statewide real-time soil temperature data map on its website that ag retailers and farmers use to determine when fall N applications are appropriate. The website can be found atextension.agron.iastate.edu/NPKnowledge
Establishing watershed groups in impaired sub-watersheds throughout Iowa implemented through partnerships of farmers, extension specialists, Iowa State University Extension and agencies at the state and local level.