- Oregon State University. Extension Service276
- Pscheidt, Jay W.17
- Walton, Vaughn M.17
- Oregon State University. Cooperative Extension Service16
- Skinkis, Patricia A.14
- Fisher, Glenn C.12
- Dreves, Amy J.11
- Pacific Northwest Cooperative Extension11
- Strik, Bernadine C. (Bernadine Cornelia), 1962 11
- Defrancesco, Joseph T.10
- Peachey, Ed10
- Washington State University. Cooperative Extension10
- Berry, Ralph E. (Ralph Eugene), 1940 8
- Kaiser, Clive8
- Pscheidt, Jay William8
- United States. Department Of Agriculture8
- Yang, Wei Qiang8
- University Of Idaho. Cooperative Extension Service7
- Burt, Lawrence A.6
- Hart, John M. (John Mervyn), 1947 6