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- Glycine max[remove]4
- Zea mays4
- groundwater contamination[remove]4
- simulation models[remove]4
- atrazine3
- water quality3
- alachlor2
- crop rotation2
- crop yield2
- field experimentation2
- groundwater2
- herbicide residues2
- mathematical models2
- nitrate nitrogen2
- sediment yield2
- soil water2
- water pollution2
- aldicarb1
- calibration1
- computer software1