Journal or Book Title
Proceedings of the 7th Integrated Crop Management Conference, Ames, IA, 1995
The agricultural landscape has four major sources of non-point source (NPS) pollutants. These are: 1) surface and subsurface runoff which carry sediment and agricultural chemicals to streams; 2) eroding streambanks which can contribute more than fifty percent of the sediment load to the stream; 3) field tile drain8 which contribute the highest concentrations of soluble agricultural chemicals to streams; and 4) livestock grazing of streamside or riparian areas which contribute to bank instability and add animal waste and pathogens to the water.
Iowa State University
Schultz, Richard C. and Isenhart, Thomas M., "Riparian Management to Protect Water Quality" (1995). Forestry Publications. 12.