- Oregon Agricultural College. Experiment Station13
- Oregon State College. Agricultural Experiment Station6
- Mote, Don C. (Don Carlos), 1887 4
- Oregon Agricultural College. Extension Service4
- Oregon State College. Extension Service4
- Hartman, Henry, 1889 3
- Robinson, R. H. (Reginald Heber), 1886 3
- Lindgren, H. A. (Harry Arthur), 1888 2
- Potter, E. L. (Ermine Lawrence), 1884 2
- Wiegand, Ernest Herman, 1886 2
- Baker County (Or.)1
- Brown, W. S. (Walter Sheldon), 1878 1
- Bullis, D. E. (Deloss Everett), 1894 19841
- Engbretson, Albert Edward1
- Fitts, Edward B.1
- Haller, M. H.1
- Hartman, Henry1
- Hurd, C. J. (Clarence J.), 1905 1
- Jamison, N. C. (Neal Clement), 1890 1
- Jardine, James T. (James Tertius), 1881 19541