Outflow from agricultural fields carries diffuse pollutants like nutrients, pesticides, herbicides etc and transports the pollutants into the nearby streams. It is a matter of serious concern for water managers and environmental researchers.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/fuzzy-rule-based-estimation-agricultural-diffuse-pollution-concentration-streams
[2] http://admin.indiaenvironmentportal.org.in/category/author/raj-mohan-singh
[3] http://admin.indiaenvironmentportal.org.in/category/journal/journal-environmental-science-engineering
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pesticides
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/herbicide
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us