- Oregon State University. Extension Service1,562
- United States. Department Of Agriculture143
- Pacific Northwest Cooperative Extension133
- Washington State University. Cooperative Extension118
- University Of Idaho. Cooperative Extension Service94
- Washington State University. Extension67
- Oregon State University. Cooperative Extension Service56
- University Of Idaho. Extension56
- University Of Idaho. Cooperative Extension System38
- Hannaway, D. B.31
- Southwest Oregon Forestry Intensified Research Program. Adaptive Phase31
- Fisher, Glenn C.30
- Oregon State University. Agricultural Experiment Station27
- Schmall, Vicki L.26
- Mcguire, William S.25
- Youngberg, Harold Wayne, 1929 25
- Brewer, Linda J.24
- Burt, Lawrence A.24
- Cross, Timothy L.24
- Seavert, Clark F.24