OpenAgricola
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- AgSpace36
- watersheds26
- soil erosion21
- simulation models20
- nitrate nitrogen19
- agricultural watersheds16
- corn15
- losses from soil15
- Zea mays14
- mathematical models13
- water pollution13
- agricultural land11
- nitrogen fertilizers11
- subsurface drainage11
- soybeans10
- tile drainage10
- drainage water9
- spatial variation9
- Glycine max8
- agricultural soils8