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- AgSpace[remove]7
- corn[remove]7
- losses from soil[remove]7
- nitrate nitrogen[remove]7
- Zea mays6
- simulation models6
- nitrogen fertilizers5
- soybeans5
- Glycine max4
- drainage water4
- fertilizer rates4
- subsurface drainage4
- Root Zone Water Quality Model3
- fertilizer application3
- nitrogen3
- water pollution3
- agricultural soils2
- agricultural watersheds2
- application rate2
- application timing2