- Bogart, Ralph, 1908 26
- Krueger, Hugo (Hugo Martin), 1902 7
- Oregon State College. Agricultural Experiment Station4
- Alexander, G. I. (Graham Irving)3
- Landers, John H. (John Herbert), 1921 3
- Frischknecht, W. Dean2
- Hoffman, E. N.2
- Macdonald, M. A. (Malcolm Allan)2
- Oregon State College. Federal Cooperative Extension Service2
- Oregon State University. Federal Cooperative Extension Service2
- Price, D. A. (Donald Albert), 1919 2
- van Arsdel, William C. (William Campbell), 1920 2
- Arnold, Mary1
- Blackwell, Robert Leighton, 1924 1
- Burris, Martin J. (Martin Joe), 1927 1
- Castle, Emery N.1
- Dahmen, J. J. (Jerome John), 1919 1
- Elings, James T.1
- Hedrick, Donald W.1
- Hoornbeek, Frank K. (Frank Kent), 1928 1