OpenAgricola
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- AgSpace1
- Triticum aestivum1
- Zea mays[remove]1
- agricultural runoff[remove]1
- application rate[remove]1
- computer software1
- corn1
- crop yield1
- equations1
- fertilizer application1
- hydrologic models1
- losses from soil1
- nonpoint source pollution1
- pollution load1
- poultry manure1
- sediment yield1
- sediments1
- simulation models[remove]1
- soil erosion1
- soil nutrients1