Subject
- Wood poles -- Preservation29
- Forests and forestry -- Oregon28
- Forests and forestry24
- Forests and forestry -- Research -- Oregon23
- Reforestation -- Oregon18
- Fences -- Design and construction16
- Forest management -- Research -- Oregon12
- Herbicides -- Research -- Oregon12
- Lumber -- Drying12
- Douglas fir11
- Reforestation -- California, Northern11
- Wood poles -- Maintenance and repair11
- Contributions in education and outreach9
- Forests and forestry -- Oregon -- Measurement9
- Wood -- Preservation9
- Wood poles -- Fumigation9
- Douglas fir -- Drying7
- Forest management -- Oregon6
- Forests and forestry -- Measurement6
- Herbicides -- Oregon6