Diffuse sources of nitrogen related to water quality protection in the Northern Great Plains

2011-04-132011-04-132000https://hdl.handle.net/10365/16366ER-62. Please excuse the quality of this file; some figures are illegible. Print copy is available for loan from NDSU Libraries.Water quality.Agricultural chemicals.Diffuse sources of nitrogen related to water quality protection in the Northern Great PlainsER-62