Subject
- Douglas fir6
- Livestock -- Effect of drought on4
- Douglas fir -- Seedlings3
- Plants, Effect of light on3
- Rangelands -- Water-supply3
- Water conservation3
- Water in agriculture3
- Water-supply, Agricultural3
- Douglas fir -- Effect of drought on2
- Douglas fir -- Growth2
- Douglas fir -- Physiology2
- Plants, Effect of cold on2
- Plants, Effect of herbicides on2
- Plants, Effect of soil moisture on2
- Wheatgrasses -- Effect of climate on2
- Wheatgrasses -- Effect of drought on2
- Abies concolor -- Siskiyou Mountains (Calif. and Or.)1
- Arid regions ecology -- Southwest, New1
- Arthropoda -- Effect of forest management on -- Oregon -- Willamette National Forest1
- Atmospheric sulphur dioxide -- Environmental aspects -- Montana1