From 2015 to 2020, a replicated tile drainage study took place in Douglas County, Illinois, evaluating 4R fertilizer nitrogen (N) management and a cereal rye cover crop before soybean to reduce tile nitrate loss. Lowell Gentry, research agronomist and retired University of Illinois principal research specialist, shares significant results from the research. This is the fourth video in a five-part series that shares research findings on how to reduce nitrate loss from agricultural fields in Illinois. 

This research was funded in part by the Illinois Nutrient Research and Education Council and the Foundation for Food & Agriculture Research and conducted in collaboration with the Illinois Fertilizer and Chemical Association. This video was produced with support from the Illinois Soybean Association checkoff program and the Illinois Nutrient Research and Education Council.