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Subject
Pesticides Environmental aspects
Water quality management
4
Groundwater Quality
4
Nitrates Environmental aspects
2
East Otter Tail County Soil and Water Conservation District (Minn.)
2
Fertilizers Environmental aspects
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2
Groundwater
2
Groundwater Pollution
2
Water quality monitoring stations
1
Agricultural chemicals Management
1
Aquifers
1
Best management practices (Pollution prevention)
1
DDT (Insecticide) Environmental aspects
1
Drinking water Analysis
1
Drinking water Contamination
1
Mercury Environmental aspects
1
Pesticides Management
1
Polybrominated diphenyl ethers Environmental aspects
1
Polychlorinated biphenyls Environmental aspects
1
Rain and rainfall
1
Runoff
1
Water Pollution
1
Water Sampling
1
Water quality
1
Watershed management
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Author
5
Geological Survey (U.S.)
3
Colorado. Department of Agriculture
3
Geological Survey (U.S.),
2
Iowa. Environmental Protection Division
2
Minnesota. Department of Natural Resources
2
University of Iowa. Hygienic Laboratory
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2
Waskom, R. M.
1
Ator, Scott W.
1
Bauder, Troy Allen
1
Colorado State University
1
Colorado State University. Cooperative Extension Service
1
Colorado State University. Extension
1
Colorado. Agricultural Chemicals and Groundwater Protection Advisory Committee
1
Colorado. Department of Public Health and Environment. Water Quality Control Division
1
Colorado. Division of Plant Industry
1
Davis, Gary M.
1
Debrewer, Linda M.
1
Denver, J. M.
1
Desetto, Lisa M.
1
Detroy, Mark G.
1
Detroy, Mark G.,
1
Duirk, Stephen E.
1
Fresno Metropolitan Flood Control District
1
Hall, Maurice D.
1
Hamilton, Pixie A.
1
Hamilton, Pixie A.,
1
Holub, Maureen A.
1
Holub, Maureen A.,
1
Hunt, Pamela K. B.
1
Hunt, Pamela K. B.,
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