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Institution
Collection
Format
Subject
33
Sewage as fertilizer
28
Wheat Fertilizers
10
Crop rotation
10
Dry farming
10
No-tillage
3
Fertilizers Application
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3
Nitrogen fertilizers
3
Organic fertilizers
2
Crops and nitrogen
2
Fertilizers Costs
2
Nitrogen Fixation
1
Broomcorn millet Fertilizers
1
Compost
1
Phosphate rock
1
Phosphatic fertilizers
1
Sewage disposal
1
Sewage disposal in the ground
1
Sudan grass Fertilizers
1
Zeolites
1
Zeolites as soil amendments
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Author
Barbarick, K. A.
30
Colorado State University. Department of Soil and Crop Sciences
27
Colorado Agricultural Experiment Station
24
Colorado State University. Cooperative Extension Service
16
Ippolito, Jim
15
Colorado State University. Extension
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12
Gourd, T. 1956-
9
McDaniel, J. P.
8
Colorado State University. College of Agricultural Sciences
5
Westfall, Dwayne G.
3
Hansen, N. C.
3
Jepson, Ron
3
Peterson, Gary, 1940-
2
Hanson, N. C.
1
Colorado Water Resources Research Institute
1
Eberl, D. D.
1
Evans, N. A.
1
Lai, T. M.
1
Sabey, B. R.
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