Subject
- Agriculture -- Oregon -- Statistics437
- Farm produce -- Oregon -- Statistics434
- 4-H clubs187
- Range plants -- Oregon76
- Agriculture -- Oregon72
- Forest influences59
- Oregon -- Climate59
- American wood58
- Forests and forestry -- Research -- Oregon57
- Reforestation -- Oregon49
- 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 States38
- Agriculture20
- Catalogs, Publishers' -- Oregon17
- College publications -- Oregon17