OpenAGRICOLA
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- AgSpace1
- Soil and Water Assessment Tool model[remove]3
- agricultural land1
- agricultural watersheds3
- ammonia1
- best management practices2
- cattle manure1
- erosion control1
- filter strips1
- geographic information systems1
- grassland soils1
- harvesting1
- land use1
- losses from soil1
- mathematical models1
- nitrates1
- nitrogen2
- nonpoint source pollution[remove]3
- nutrients1
- pastures1