Subject
- Forests and forestry -- Research -- Oregon5
- Nitrogen -- Fixation5
- Alfalfa4
- Forest products -- Research -- Oregon4
- Oregon State University. Forest Research Laboratory4
- Rhizobium4
- Agriculture3
- Agriculture -- Oregon3
- Forests and forestry -- Oregon3
- Hatfield Marine Science Center3
- Herbicides3
- Plant-soil relationships3
- Plant-water relationships3
- Coho salmon2
- Conifers -- West (U.S.) -- Ecology2
- Cucumber mosaic virus2
- Dissertations, Academic -- United States -- Bibliography -- Catalogs2
- Forest ecology -- West (U.S.)2
- Lake ecology -- West (U.S.)2
- Leuconostoc2