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Institution
Collection
Subject
43
Nitrogen fertilizers
17
Phosphatic fertilizers
9
Nitrogen fertilizers Environmental aspects
7
Organic fertilizers
6
Manure handling
6
Winter wheat Fertilizers
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5
Irrigation Management
5
Irrigation water Quality
4
Nitrogen fertilizers Control
4
Water quality management
3
Grain Fertilizers
3
Groundwater Pollution
3
Phosphatic fertilizers Control
3
Potatoes Fertilizers
3
Winter wheat Composition
2
Agricultural chemicals Management
2
Aquifers
2
Beans Fertilizers
2
Corn Fertilizers
2
Fertilizers Application
2
Gardening
2
Manures Environmental aspects
2
Mountain meadows Fertilizers
2
Nitrogen in agriculture
2
Nutrient pollution of water Prevention
2
Rain gardens
2
Soils Nitrogen content
2
Swine Manure
2
Water Pollution Prevention
2
Watersheds Protection
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Author
22
Colorado State University. Cooperative Extension Service
16
Davis, J. G. 1962-
12
Westfall, Dwayne G.
9
Colorado State University. Extension
8
Waskom, R. M.
5
Bauder, Troy Allen
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5
Geological Survey (U.S.),
4
Goos, R. J.
4
Ludwick, Albert E.
4
National Water-Quality Assessment Program (U.S.)
4
ScienceDirect (Online service)
3
Barbarick, K. A.
3
Follett, R. F. 1939-
3
Mortvedt, J. J.
2
Andales, Allan A.
2
Broner, Israel, 1951-
2
Brummer, Joe E.
2
Geological Survey (U.S.)
2
Gronberg, JoAnn M.,
2
Hatfield, Jerry L.
2
Meyer, Robert B.
1
Adams, J. Richard 1898-
1
Agricultural Chemicals and Groundwater Protection (Program)
1
Alabama. Department of Agriculture and Industries
1
Alexander, Richard B.
1
Anderson, M. S. 1887-1983
1
Arnold, Terri L.,
1
Cadmus Group
1
Carpenter, Len H.
1
Cedar Falls Utilities (Iowa)
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