- Oregon State University. Extension Service74
- Oregon State College. Agricultural Experiment Station30
- Hart, John M. (John Mervyn), 1947 25
- Skinkis, Patricia A.13
- Pscheidt, Jay W.12
- Mellbye, Mark Edward11
- Walton, Vaughn M.11
- Christensen, Neil Walter, 1944 10
- Gardner, Ernest Hugh9
- Oregon State University. Forest Research Laboratory9
- Jackson, T. L. (Thomas Lloyd), 1922 8
- Oregon State University. Agricultural Experiment Station8
- Peachey, Ed8
- Anderson, Nicole P.7
- Dreves, Amy J.7
- Horneck, Donald Arthur7
- Oregon Agricultural College. Experiment Station6
- Sullivan, Dan M. (Dan Matthew), 1954 6
- Flowers, Michael Darrell, 1971 5
- Fore, R. E. (Robert Estes), 1907 5