Subject
- Douglas fir2
- Plants, Effect of light on2
- Abscisic acid1
- Austrian pine -- Seeds1
- Bird populations -- Washington (State)1
- Conifers1
- Dichlorophenoxyacetic acid1
- Douglas fir -- Diseases and pests1
- Douglas fir -- Genetics1
- Douglas fir -- Planting1
- Douglas fir -- Seeds1
- Fir -- Oregon -- Germplasm resources1
- Forest ecology1
- Forest ecology -- Washington (State)1
- Forest genetics1
- Mountain hemlock -- Diseases and pests1
- Pine -- Seeds -- Europe1
- Plant communities1
- Plant competition1
- Plants -- Transpiration1