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- alachlor[remove]1
- application rate[remove]1
- application timing[remove]1
- atrazine[remove]1
- drainage water[remove]1
- geographic information systems1
- groundwater contamination1
- herbicide residues1
- leaching1
- losses from soil1
- metolachlor1
- metribuzin1
- nitrate nitrogen1
- nitrates1
- nitrogen fertilizers1
- runoff1
- streams1
- surface water1
- tile drainage1
- water pollution[remove]1