Subject
- Range plants -- Oregon76
- Agriculture -- Oregon67
- Forest influences59
- Oregon -- Climate59
- Forests and forestry -- Research -- Oregon57
- Reforestation -- Oregon49
- American wood45
- 4-H clubs44
- Forests and forestry -- Washington (State) -- Statistics43
- Forests and forestry -- Oregon42
- Forests and forestry -- Washington (State)42
- Forest surveys -- Washington (State)40
- Forest surveys -- Oregon39
- Forests and forestry -- Oregon -- Statistics39
- Wood -- United States31
- Catalogs, Publishers' -- Oregon17
- College publications -- Oregon17
- Wood poles -- Preservation17
- Fences -- Design and construction16
- Agriculture15