- Matson, Walter E.20
- Cosby, H. E. (Hubert Elmer), 1887 19
- Oregon State University. Extension Service16
- Fox, F. E. (Frank Elmer), 1889 12
- Oregon State College. Federal Cooperative Extension Service9
- Oregon State Agricultural College. Extension Service7
- Oregon Agricultural College. Extension Service6
- Oregon State College. Agricultural Experiment Station6
- Lunn, A. G. (Alfred Gunn), 1883 4
- Price, F. E. (Frederick Earl), 1898 4
- Bok, Karen3
- Capizzi, Joseph3
- Iversen, Patrick L.3
- Kurth, Andreas3
- Macswan, Iain C.3
- Matson, David O.3
- Oregon State Agricultural College. Agricultural Experiment Station3
- Skilling, Douglas E.3
- Smith, Alvin3
- Smith, Chet C.3