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Topic
- Alfalfa 20
- Croplands 10
- Seeds 4
- Sweet clover 3
- Universities and colleges--Employees 3
- Alsike clover 2
- Bees 2
- Clover 2
- Habitat (Ecology) 2
- Red clover 2
- Agricultural exhibitions 1
- Barns 1
- Graminaceae 1
- Potatoes 1
- Poultry--Housing 1
