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- Apples 96
- Agriculture 23
- Windbreaks, shelterbelts, etc 8
- Oregon State University. Agricultural Experiment Station 7
- Universities and colleges--Alumni and alumnae 7
- Universities and colleges--Faculty 7
- Wood, G. B. (Gregory Burton), 1909- 7
- Agricultural laborers 5
- Grain 5
- Pears 5
- Harvesting 4
- Potatoes 4
- Tractor trailer combinations 4
- Corn 3
- Pumpkin 3
- Spraying and dusting in agriculture 3
- Agricultural exhibitions 2
- Bees 2
- Birds--Nests 2
- Bluebirds 2