Subject
- Forests and forestry -- Northwest, Pacific9
- Forests and forestry -- Research -- Northwest, Pacific6
- Oregon State Agricultural College6
- Pacific Northwest Forest and Range Experiment Station (Portland, Or.)6
- Forests and forestry5
- Climatic changes -- Oregon -- Evaluation4
- Wood poles4
- Douglas fir -- Northwest, Pacific3
- Forests and forestry -- Research -- Oregon3
- Herbicides3
- Weeds -- Control3
- Wood -- Testing3
- Agricultural experiment stations -- Oregon2
- Agriculture -- Oregon2
- American wood2
- Biodiversity conservation2
- Columbia River2
- Conifers -- Diseases and pests -- Montana2
- Douglas fir2
- Engineering -- Research -- Oregon2