Subject
- Christmas tree growing -- Northwest, Pacific2
- Christmas tree growing -- Washington (State)2
- Christmas tree farming1
- Christmas tree growing -- Oregon1
- Christmas tree growing -- Oregon, Western1
- Christmas trees -- Fertilizers -- Oregon, Western1
- Christmas trees -- Fertilizers -- Washington (State)1
- Christmas trees -- Nutrition -- Oregon, Western1
- Christmas trees -- Nutrition -- Washington (State)1
- Christmas trees -- Oregon1
- Christmas trees -- Pruning1
- Christmas trees -- Pruning -- Northwest, Pacific1
- Christmas trees -- Washington (State)1
- Christmas trees -- Weed control -- Northwest, Pacific1
- Conifers -- Oregon -- Seedlings1
- Douglas fir1
- Douglas fir -- Pruning -- Northwest, Pacific1
- Fir -- Oregon1
- Fir -- Washington (State)1
- Forest landowners -- Taxation -- United States1