Subject
- Plant competition -- Oregon3
- Douglas fir -- Growth2
- Ponderosa pine -- Oregon2
- Red alder -- Growth2
- Air -- Pollution -- Carcinogenicity -- Ohio -- Carroll county1
- Biotic communities -- Oregon -- Mathematical models1
- Conifers1
- Douglas fir1
- Douglas fir -- Coast Ranges1
- Douglas fir -- Coast Ranges -- Ecology1
- Douglas fir -- Oregon1
- Douglas fir -- Oregon -- Ecology1
- Douglas fir -- Seedlings1
- Family recreation1
- Fire ecology -- Oregon -- H.J. Andrews Experimental Forest1
- Fire ecology -- Oregon -- Willamette National Forest1
- Forest management -- Computer programs1
- Forest plants -- Oregon1
- Forest thinning1
- Gas drilling (Petroleum engineering) -- Environmental aspects -- Ohio -- Carroll county1