Subject
- Douglas fir49
- Forests and forestry -- Measurement8
- Forest management7
- Forest thinning7
- Forest management -- Mathematical models4
- Forests and forestry -- Mensuration4
- Optical radar4
- Plants -- Transpiration4
- Seedlings4
- Western hemlock4
- Forest ecology3
- Forest management -- Northwest, Pacific3
- Forests and forestry -- Economic aspects3
- Red alder3
- Reforestation3
- Trees -- Growth3
- Aerial photography in forestry2
- Conifers2
- Douglas fir -- Growth2
- Douglas fir -- Growth -- Mathematical models2