- Oregon State University. Extension Service171
- Oregon State College. Agricultural Experiment Station95
- Pscheidt, Jay W.69
- Oregon State University. Agricultural Experiment Station36
- Peachey, Ronald Edward31
- Walton, Vaughn M.31
- Fisher, Glenn C.28
- Mote, Don C. (Don Carlos), 1887 27
- Peachey, Ed27
- Oregon Agricultural College. Experiment Station25
- Olsen, Jeff L.23
- James, Robert L.22
- United States. Forest Service. Northern Region19
- Baggett, James R.18
- Wiman, Nik G.18
- Zeller, S. M. (Sanford Myron), 1885 194818
- Dreves, Amy J.17
- Skinkis, Patricia A.17
- Mack, H. J.15
- Frazier, W. A.14