- Oregon State College. Agricultural Experiment Station43
- Oregon State University. Extension Service36
- Oregon State University. Agricultural Experiment Station26
- Jones, I. R. (Idwal Ralph), 1898 16
- Potter, E. L. (Ermine Lawrence), 1884 15
- Oregon Agricultural College. Experiment Station13
- Adams, H. P. (Holyoke Purinton), 1922 10
- Gamroth, Michael J.9
- Withycombe, Robert, 1880 9
- Oregon State Agricultural College. Agricultural Experiment Station8
- Oregon Agricultural Experiment Station7
- Ewalt, H. P.6
- Hoffman, E. N.6
- Brandt, P. M. (Philip Martin), 1888 5
- Frischknecht, W. Dean5
- Oliver, A. W. (Alfred Weaver), 1894 5
- Bogart, Ralph, 1908 4
- Dean, H. K. (Harold Karl), 1889 4
- French, H. T. (Hiram Taylor), 1862 4
- Oldfield, J. E., 1921 4