Scientists examined how growth rates in the trees changed over 91-year period. As warm, dry conditions continue in the future, fewer Douglas firs expected to grow Growth slowed across species’ range, ...

Growth of Douglas fir [Pseudotsuga menziesii (Mirb.) Franco] was increased by controlling grasses and broadleaf herbs with eight herbicide regimes during the first 3 yr after planting on a ...

A fungal disease attacking Douglas-fir trees along the Pacific Northwest coast is intensifying and may be linked to a warmer climate and extensive planting of Douglas-fir on logged tracts, new Oregon ...

JOINT BASE LEWIS-MCCHORD, Wash., April 21, 2010 -- Out of their own good will, many people plant trees on Arbor Day or Earth Day, wanting to give a little something back to the environment. But for 14 ...

A new study finds the West is likely to see slower-growing Douglas fir trees in the future, as temperatures and droughts increase with climate change. Researchers with the University of ...

EATONVILLE, Wash. — A tree farm in Eatonville is experimenting with a unique way to guard its younger trees against hungry deer and elk. They’re using trees to protect trees. The Townsend family has ...

West Coast forest landowners are expected to adapt to climate change by gradually switching from Douglas-fir to other types of trees such as hardwoods and ponderosa pine. West Coast forest landowners ...

Douglas-fir (Pseudotsuga menziesii Mirb. Franco) seedlings were grown in a series of 7 sub-irrigated sand culture experiments in which N was supplied from either a nitrate or an ammonium source. The ...