- Crowell, H. H. (Hamblin Howes), 1913 9
- Oregon State College. Federal Cooperative Extension Service9
- Every, R. W.8
- Mote, Don C. (Don Carlos), 1887 7
- Thompson, B. G. (Benjamin Garrison), 1891 7
- Morrison, H. E.5
- Oregon State University. Federal Cooperative Extension Service4
- Oregon State Agricultural College. Extension Service3
- Capizzi, Joseph2
- Fisher, Glenn C.2
- Moore, Larry W.2
- Oregon State University. Extension Service2
- Rondon, Silvia I.2
- Allen, Donald G.1
- Bahlol, H.1
- Bai, Barry B.1
- Bess, E.1
- Calkin, James D.1
- Canfield, Marilyn1
- Choi, Man Yeon1