- Oregon State University57
- Oregon State University. Extension Service16
- Lev, Larry6
- Mahrt, Larry5
- Murray, Helene5
- Brewer, Linda J.3
- Oregon State University. Forest Research Laboratory3
- Stephenson, Garry Owen3
- United States. Agricultural Research Service3
- Washington State University. Extension3
- Christensen, Terry M.2
- Green Mcgrath, Daniel2
- Lev, Larry S.2
- Mahrt, L.2
- Oregon State University. Agricultural Experiment Station2
- Oregon State University. Department Of Crop Science2
- Oregon. Department Of Fish And Wildlife2
- Pacific Northwest Cooperative Extension2
- Sorte, Bruce2
- Sun, Jielun2