Subject
- Douglas fir247
- Douglas fir -- Diseases and pests29
- Douglas fir -- Drying24
- Douglas fir -- Growth24
- Douglas fir -- Seedlings21
- Lumber -- Drying21
- Douglas fir -- Oregon -- Growth17
- Douglas fir beetle15
- Report (United States. Forest Service. Northern Region. Forest Pest Management)15
- Douglas fir -- Genetics14
- Douglas fir -- Mechanical properties14
- Bark11
- Douglas fir -- Oregon11
- U.S. International Biological Program. Coniferous Forest Biome11
- Douglas fir -- Diseases and pests -- Oregon10
- Douglas fir -- Testing9
- Douglas fir -- Diseases and pests -- Montana8
- Douglas fir -- Reproduction8
- Reforestation -- Oregon8
- Seedlings8