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- Croplands 48
- Farmers 37
- Harvesting machinery 26
- Combines (Agricultural machinery) 24
- Universities and colleges--Alumni and alumnae 19
- Sprinkler irrigation 13
- Agricultural machinery 11
- Barley 9
- Agricultural laborers 6
- Peas 4
- College students 3
- Farm buildings 3
- Trucks 3
- Children 2
- Dwellings 2
- Henderson, Robert W. (Robert Wesley), 1914-2006 2
- Irrigation farming 2
- Oregon National Historic Trail 2
- Oregon State University. Agricultural Experiment Station 2
- Universities and colleges--Faculty 2