- Oregon State College. Agricultural Experiment Station45
- Oregon State University. Extension Service36
- Oregon State University. Agricultural Experiment Station27
- Jones, I. R. (Idwal Ralph), 1898 17
- Bogart, Ralph, 1908 11
- Adams, H. P. (Holyoke Purinton), 1922 10
- Gamroth, Michael J.8
- Oregon State Agricultural College. Agricultural Experiment Station8
- Brandt, P. M. (Philip Martin), 1888 6
- Ewalt, H. P.6
- Frischknecht, W. Dean6
- Hoffman, E. N.6
- Krueger, Hugo (Hugo Martin), 1902 5
- Oldfield, J. E., 1921 5
- Ralston, A. T. (Allen Thurman), 1915 5
- Church, D. C.4
- Oliver, A. W. (Alfred Weaver), 1894 4
- Raleigh, Robert J.4
- Richards, D. E. (Dale Everette), 1892 4
- Sherwood, D. H. (Donald Henry), 1911 4