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Douglas-fir is one of the world's best timber-producing species and yields more timber than any other species in North America, making the forestlands of western Oregon, Washington, and British Columbia the most productive on the continent. In 2011, Douglas-fir represented 34.2% of US lumber exports, to a total of 1.053 billion board-feet.
Pseudotsuga menziesii (Douglas fir proper) is widespread in western North America and is an important source of timber. The number of species has long been debated, but two in western North America and two to four in eastern Asia are commonly acknowledged.
Pseudotsuga macrocarpa, commonly called the bigcone spruce or bigcone Douglas-fir, is an evergreen conifer native to the mountains of southern California. It is notable for having the largest (by far) cones in the genus Pseudotsuga , hence the name.
In the United States, Douglas-Fir timber piles are used most often in the Pacific Northwest while Southern Pine are used most commonly on the East Coast. Douglas-Fir is used most commonly on the west coast due to its high strength, renewability and low cost. [5]
The timber is used for construction, bridge building, furniture, and wood fiber. [2] [4] Pseudotsuga sinensis var. wilsoniana, Taiwan Douglas-fir, is sometimes treated as its own species, Pseudotsuga wilsoniana. This variety is geographically isolated (being restricted to Taiwan) but is not markedly distinct morphologically from var. sinensis ...
However, timber was excluded from the Navigation Acts allowing the colonies to export vast quantities of wood commodities to nations otherwise beholden to British duties. Oak staves for wine barrels, along with building timber, white pine boards, and cedars shingles were traded to Spain, Portugal, the Canary Islands, the Azores, and Madeira. In ...
The coast Douglas fir grows in coastal regions up to altitudes of about 1,800 meters; the Rocky Mountain Douglas fir grows farther inland, at altitudes ranging from 800 m to 3,000 m or higher. The wood is used for construction, for homebuilt aircraft, for paper pulp, and also as firewood. [citation needed]
Rocky Mountain Douglas-fir is a valuable timber tree. The wood is exceptionally strong and is used for structural timber as well as poles, plywood , pulp, dimensional lumber , railroad ties, mine timbers, log cabins, posts and poles, fencing, and firewood.
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