- Oregon State University. Extension Service180
- Oregon State College. Agricultural Experiment Station107
- Pscheidt, Jay W.94
- Peachey, Ronald Edward37
- Peachey, Ed34
- Olsen, Jeff L.29
- Walton, Vaughn M.28
- Mote, Don C. (Don Carlos), 1887 27
- United States. Forest Service. Northern Region. State & Private Forestry27
- Brunner, Jay F.24
- van Steenwyk, Robert A.24
- Wiman, Nik G.24
- Burts, Everett23
- Fisher, Glenn C.22
- Beers, Elizabeth H.21
- Castagnoli, S.21
- Westigard, Peter H.21
- Oregon State University. Agricultural Experiment Station19
- Macswan, Iain C.18
- Mcwhorter, Frank, 1896 198518