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- Field experiments[remove]23
- Varieties[remove]23
- Corn10
- Seeds8
- Testing7
- Wheat3
- Alfalfa2
- Fruit2
- Potatoes2
- Vegetables2
- Berries1
- Composition1
- Cowpea1
- Fertilizers1
- Grasses1
- Hay1
- Watson, Eugene J.1