Subject
- Douglas fir[remove]119
- Bark7
- Germination5
- Forests and forestry -- Measurement4
- Forest ecology3
- Forest products3
- Seedlings3
- Veneers and veneering3
- Western hemlock3
- Forest thinning2
- Lumbering2
- Mulching2
- Mycorrhizas2
- Plants -- Transpiration2
- Reforestation2
- Tannins2
- Vernalization2
- Wood -- Preservation2
- Wood-pulp2
- Afforestation1