- Oregon State University. Agricultural Experiment Station568
- Columbia Basin Agricultural Research Center38
- United States. Agricultural Research Service38
- Oregon State University. Malheur Experiment Station37
- Boersma, L.22
- Oregon State University. Extension Service22
- Central Oregon Agricultural Research Center17
- Klamath County (Or.)16
- Oregon State University. Klamath Agricultural Experiment Station16
- Eastern Oregon Agricultural Research Center11
- Mack, H. J.11
- Baggett, James R.10
- United States. Agency For International Development10
- Frazier, W. A.9
- Adair, John, 1927 8
- Oldfield, J. E., 1921 8
- Simonson, Gerald Herman, 1927 8
- Stout, Floyd Madison, 1931 8
- United States. Department Of Agriculture8
- Conklin, Frank S.7