- Oregon State University. Extension Service77
- Pscheidt, Jay W.46
- Oregon State College. Agricultural Experiment Station44
- Peachey, Ronald Edward28
- Olsen, Jeff L.20
- Mumford, D. Curtis (Dwight Curtis), 1900 19
- Oregon State Agricultural College. Agricultural Experiment Station14
- Wiman, Nik G.14
- Peachey, Ed13
- Powers, W. L. (Wilbur Louis), 188713
- Oregon State University. Agricultural Experiment Station12
- Castagnoli, S.9
- Upper Willamette Resource Conservation And Development Project8
- Walton, Vaughn M.8
- Defrancesco, Joseph T.7
- Kuhlman, G. W. (Gustav Wesley), 1894 7
- Oregon Agricultural College. Experiment Station7
- Yang, Wei Qiang7
- Becker, Manning H. (Manning Henry), 1922 6
- Davis, George B. (George Balfour), 1915 6