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Agricultural pollution
Nutrient pollution of water
3
Water quality
2
Atrazine Physiological effect
2
Bacterial pollution of water
2
Nonpoint source pollution
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1
Agriculture Environmental aspects
1
Groundwater
1
Groundwater Quality
1
Pesticides Environmental aspects
1
Streamflow
1
Terracing
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Author
4
Geological Survey (U.S.)
3
Geological Survey (U.S.),
3
Pennsylvania. Department of Environmental Protection
2
Wichita (Kan.)
1
Christensen, Victoria G.
1
Christensen, Victoria G.,
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1
Crain, Angela S.
1
Gustafson-Minnich, Linda C.,
1
Hall, David W.,
1
Kentucky. Department of Agriculture
1
Kingsbury, James A.
1
Koerkle, Edward H.
1
Koerkle, Edward H.,
1
Lietman, Patricia L.,
1
National Water-Quality Assessment Program (U.S.)
1
Pope, Larry M.
1
Pope, Larry M.,
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