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- Harvesting 173
- Agriculture 148
- Agricultural machinery 34
- Agricultural laborers 25
- Graminaceae 25
- Hops 23
- Orchards 23
- Oregon State University. Extension Service 19
- Mexican American agricultural laborers 18
- Plum 15
- Strawberries 12
- Beans 9
- Portraits, Group 9
- Cherry 8
- Combines (Agricultural machinery) 8
- Harvesting machinery 8
- Oregon Agricultural College. Experiment Station 7
- Oregon State Agricultural College. Experiment Station 7
- Gooseberries 6
- Potatoes 6