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- Glycine max3
- Zea mays[remove]3
- animal manures[remove]3
- corn3
- crop rotation[remove]3
- crop yield3
- soybeans3
- sustainable agriculture3
- Triticum aestivum2
- crop management2
- low input agriculture2
- no-tillage2
- Medicago sativa1
- Oryza sativa1
- Phaseolus vulgaris1
- Trifolium pratense1
- agroecology1
- alfalfa1
- alternative farming1
- beans1