This fact sheet summarizes research that was part of a five-year project to explore residual nitrate in a variety of cropping systems. The experiment was conducted on a farm in an area where the City of Sioux Center owns several shallow wells that supply more half of the municipal water supplies.
Iowa State University
Ohrtman, Becky, "Crop Rotation Research Studies Residual Nitrate" (2013). Leopold Center Pubs and Papers. 19.