- Oregon State University. Agricultural Experiment Station64
- Oregon State University. Extension Service43
- Oregon State University. Malheur Experiment Station32
- Oregon State College. Agricultural Experiment Station19
- Hart, John M. (John Mervyn), 1947 18
- Pscheidt, Jay W.12
- Sullivan, Dan M. (Dan Matthew), 1954 9
- Horneck, Donald Arthur8
- Long, L. E. (Lynn Edwards), 1953 8
- Castagnoli, S.7
- Shearer, Peter W.7
- Pacific Northwest Cooperative Extension6
- Peachey, Ronald Edward6
- Powers, W. L. (Wilbur Louis), 18876
- United States. Agricultural Research Service6
- University Of Idaho. Extension6
- Washington State University. Extension6
- Jackson, T. L. (Thomas Lloyd), 1922 5
- Olsen, Jeff L.5
- Oregon State Agricultural College. Agricultural Experiment Station5