- Oregon State University. Agricultural Experiment Station[remove]689
- United States. Agricultural Research Service37
- Columbia Basin Agricultural Research Center35
- Oregon State University. Malheur Experiment Station27
- United States. Agency For International Development25
- Boersma, L.22
- International Maize And Wheat Improvement Center18
- Klamath County (Or.)17
- Oregon State University. Klamath Agricultural Experiment Station17
- Central Oregon Agricultural Research Center14
- Davidson, T. P.12
- Eastern Oregon Agricultural Research Center12
- Ralston, A. T. (Allen Thurman), 1915 12
- Mason, Robert George11
- United States. Department Of Agriculture11
- United States. Weather Bureau11
- Taylor, George H.10
- Adair, John, 1927 9
- Bartlett, Alexi9
- Oldfield, J. E., 1921 9