- Oregon State University. Agricultural Experiment Station235
- Oregon State College. Agricultural Experiment Station121
- Oregon State College. Federal Cooperative Extension Service53
- Jackson, T. L. (Thomas Lloyd), 1922 42
- Oregon State College. Extension Service32
- Oregon Agricultural College. Experiment Station30
- Mumford, D. Curtis (Dwight Curtis), 1900 16
- United States. Agricultural Research Service16
- Oregon Agricultural Experiment Station15
- Thomas, M. D.15
- Breithaupt, L. R. (Le Roy), 1886 14
- Columbia Basin Agricultural Research Center14
- Gardner, Ernest Hugh14
- Wiegand, Ernest Herman, 1886 14
- Powers, W. L. (Wilbur Louis), 188711
- Mack, H. J. (Harry John), 1926 10
- Oregon State Agricultural College. Agricultural Experiment Station10
- Oregon State University. Malheur Experiment Station10
- Eastern Oregon Agricultural Research Center9
- Mack, H. J.9