Spring has sprung and gardeners can hardly wait to get their hands in the soil. Got questions before you get started? Get answers from Ask an Expert, an online question-and-answer tool from Oregon ...

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 ...

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, according to a new Oregon ...

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 ...