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 ...

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 ...

Countless studies and reports exist describing how a landscape is impacted after logging Douglas-fir: What is the impact on the soil? Should one leave the debris in place? Pile it? Burn it or haul it ...

PORTLAND, Ore. (KOIN) — On a hillside in the Clatsop State Forest, small flags dot the hillside of a clear-cut area. It’s a site where the Oregon Department of Forestry planted new seedlings in early ...

Calla Saul hugged a potted Douglas fir seedling to her chest and sprinted across a meadow at Columbia Springs on Saturday. She was among more than 40 kids and their parents who hiked over a bridge, ...

CORVALLIS, Ore. (KTVZ) -- Long considered pests by forest managers, deer and elk can help Douglas-fir seedlings thrive under certain vegetation management conditions, a five-year study by Oregon State ...

The downed limbs and other woody debris that are inevitable byproducts of timber harvest could be among the most important components of post-harvest landscapes, according to a new study led by the ...

When the first English colony was established at Jamestown in 1607, the Douglas fir seedling was about eight years old, growing on a hillside 20 minutes northwest of what is now Corvallis. It climbed ...

Two of California's most highly prized trees -- coast redwood and Douglas fir -- are susceptible to Phytophthora ramorum, the pathogen that causes Sudden Oak Death, University of California ...