- Hart, John M. (John Mervyn), 1947 72
- Oregon State University. Extension Service51
- Horneck, Donald Arthur18
- Christensen, Neil Walter, 1944 16
- Mellbye, Mark Edward11
- Strik, Bernadine C. (Bernadine Cornelia), 1962 8
- Anderson, Nicole P.7
- Sullivan, Dan M. (Dan Matthew), 1954 7
- Young, William C. (William Clyde)7
- Flowers, Michael Darrell, 1971 6
- Wysocki, Donald John, 1952 6
- Gingrich, Gale Allen5
- Lutcher, L. K. (Lawrence K.)5
- Pacific Northwest Cooperative Extension5
- Marx, E. S.4
- Petrie, S. E.4
- Righetti, Tim4
- Butler, M. D. (Marvin D.)3
- Chastain, Thomas G.3
- Cogger, Craig George, 1950 3