- Oregon State University. Agricultural Experiment Station156
- Oregon State College. Agricultural Experiment Station86
- Oregon Agricultural College. Experiment Station30
- Oregon State College. Extension Service30
- Jackson, T. L. (Thomas Lloyd), 1922 22
- Oregon Agricultural Experiment Station19
- United States. Agricultural Research Service16
- Columbia Basin Agricultural Research Center15
- Oregon State College. Federal Cooperative Extension Service11
- Mack, H. J. (Harry John), 1926 10
- Powers, W. L. (Wilbur Louis), 188710
- Klamath County (Or.)9
- Oregon State Agricultural College. Agricultural Experiment Station9
- Oregon State University. Malheur Experiment Station9
- Wilster, G. H. (Gustav Hans), 18939
- Mumford, D. Curtis (Dwight Curtis), 1900 8
- Oregon State University. Klamath Agricultural Experiment Station8
- Eastern Oregon Agricultural Research Center7
- Oregon State University. Klamath Basin Research And Extension Center7
- Roseberg, Richard J.7