Subject
- Forest influences59
- Oregon -- Climate59
- Forests and forestry -- Research -- Oregon30
- Wood poles -- Preservation28
- Wood poles -- Maintenance and repair27
- Wood poles -- Fumigation24
- Forests and forestry -- Oregon19
- Forests and forestry15
- Douglas fir14
- Contributions in education and outreach12
- Forest management -- Research -- Oregon12
- Herbicides -- Research -- Oregon12
- Reforestation -- Oregon12
- Forests and forestry -- Oregon -- Measurement8
- Herbicides -- Oregon8
- Wood -- Preservation8
- Forests and forestry -- Measurement7
- Forest management -- Oregon6
- Brush -- Control -- Oregon5
- Douglas fir -- Seedlings5