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- Universities and colleges--Faculty 22
- Agricultural experiment stations 17
- Umatilla Branch Experiment Station 15
- Columbia Basin Agricultural Research Center 11
- Croplands 11
- Oregon State University. Extension Service 9
- Rohde, Charles R. 7
- Boards of directors 6
- Oregon State University. Agricultural Experiment Station 6
- Universities and colleges--Employees 6
- Exhibitions 5
- Oveson, M. M. (Merrill Mahonri), 1900- 5
- Agricultural machinery 4
- Cattle--Feeding and feeds 4
- Davidson, Thomas 4
- Laboratories 4
- Oregon State University. Cooperative Extension Service 4
- Soil Science 4
- Wheat 4
- Barley 3