People in Ecosystems Watershed Integration (PEWI)

Iowa State University Extension and Outreach Water Quality Program

Water Quality Program Homepage
Resource link: http://www.extension.iastate.edu/waterquality/

This site includes information and tools to help farmers, farmland owners, and the public understand and manage the linkages between crop production and water quality. An interactive tool on the N-factor, which integrates explanatory videos and downloadable extension publications, is especially helpful.