OpenAgricola
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- Glycine max2
- Triticum aestivum2
- Zea mays[remove]2
- corn2
- crop rotation[remove]2
- crop yield2
- grain yield2
- long term experiments2
- no-tillage2
- organic production[remove]2
- soybeans2
- sustainable agriculture2
- AgSpace1
- alternative farming1
- animal manures1
- chiseling1
- composts1
- crop management1
- cropping systems1
- farming systems1