- Oregon State University. Agricultural Experiment Station390
- Oregon State College. Agricultural Experiment Station220
- Oregon Agricultural College. Experiment Station170
- Oregon State Agricultural College. Agricultural Experiment Station144
- Oregon State College. Federal Cooperative Extension Service124
- Oregon State College. Extension Service66
- Oregon State Agricultural College. Extension Service55
- Oregon Agricultural Experiment Station46
- Columbia Basin Agricultural Research Center33
- Oregon Agricultural College. Extension Service32
- Powers, W. L. (Wilbur Louis), 188732
- United States. Agricultural Research Service32
- Mote, Don C. (Don Carlos), 1887 28
- Oregon State University. Klamath Basin Research And Extension Center24
- Potter, E. L. (Ermine Lawrence), 1884 24
- Oregon State University. Malheur Experiment Station22
- Zeller, S. M. (Sanford Myron), 1885 194821
- Oregon State University. Federal Cooperative Extension Service20
- Robinson, R. H. (Reginald Heber), 1886 20
- Schuster, C. E. (Carl Ephraim), 1889 20