- Oregon State University. Extension Service35
- Oregon State College. Agricultural Experiment Station20
- Jones, I. R. (Idwal Ralph), 1898 18
- Gamroth, Michael J.13
- Adams, H. P. (Holyoke Purinton), 1922 11
- Ewalt, H. P.10
- Anderson, D. E. (Donald Eugene)6
- Bodyfelt, F. W. (Floyd W.), 1937 4
- Brandt, P. M. (Philip Martin), 1888 4
- Downing, Troy (Troy Woerner)4
- Buyserie, Annette C.3
- Gangwer, Michael I.3
- Haag, J. R. (Joseph Roy), 1896 3
- Hart, John M. (John Mervyn), 1947 3
- Marx, E. S.3
- Oregon State Agricultural College. Agricultural Experiment Station3
- Pacific Northwest Cooperative Extension3
- Bary, Andy I.2
- Carroll, Diane J.2
- Cleveland, George W.2