Subject
- Agriculture -- Oregon73
- Forests and forestry -- Research -- Oregon57
- 4-H clubs54
- Reforestation -- Oregon48
- Forests and forestry -- Washington (State) -- Statistics43
- Forests and forestry -- Washington (State)42
- Forest surveys -- Washington (State)40
- Forests and forestry -- Oregon40
- Forest surveys -- Oregon37
- Forests and forestry -- Oregon -- Statistics37
- Forest influences35
- Oregon -- Climate35
- Agriculture31
- American wood22
- Wood -- United States18
- Catalogs, Publishers' -- Oregon17
- College publications -- Oregon17
- Wood poles -- Preservation17
- Fences -- Design and construction16
- Fish-culture -- Oregon -- Statistics14