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Topic
- Oregon Agricultural College. Experiment Station 52
- Agriculture 46
- Pears--Varieties 43
- Plants, Cultivated--Field experiments 34
- Agricultural experiment stations 31
- Croplands 31
- Sulfur fertilizers 28
- World War, 1939-1945 24
- Universities and colleges--Faculty 22
- Agricultural machinery 21
- Foote, Wilson H. 16
- Oregon State Agricultural College. Agricultural Experiment Station 14
- Orchards 13
- Oregon Agricultural College 10
- Livestock 9
- Vegetables 9
- Award presentations 8
- Crop and Soil Science 8
- Kronstad, Warren E. (Warren Ervind), 1932- 8
- Alien plants 7
