WebThe Douglas fir tops out at a height of between 40 and 70 feet with a spread of between 12 and 20 feet. The fruit of the tree is a light, brown cone that grows to a length of between …
Abies grandis (Dougl - USDA
The Douglasfir grows to a height of 40–70' and a spread of 12–20' at maturity. Growth Rate This tree grows at a medium rate, with height increases of 13–24" per year. See more The Douglasfir prefers acidic or neutral soil that is well-drained, thought it can also be found in its native habitat of rocky mountain slopes. It is sensitive to drought. See more Douglasfir seeds are used by blue grouse, songbirds, squirrels, rabbits and other small animals. Antelope, deer, elk, mountain goats and mountain sheep eat the twigs and foliage. … See more There are two geographical varieties of Douglasfir: the Coast Douglasfir (Pseudotsuga menziesii var. menziesii) native to British … See more While the Douglasfir may have first been introduced to cultivation by botanist-explorer David Douglas in 1826, its importance to American history continues unabated. As well as being the country's top source of lumber … See more WebDescription. Common Douglas-fir is one of the most important and valuable timber species of Western North America, as well as many other temperate forest regions in which it has been successfully introduced. It is a … laglapp dunjacka
W.10 Forest Stand Density Guide - USDA
WebMar 12, 2024 · The first set of data (DATASET I) consisted of measurements on 716 trees (615 Douglas-fir and 101 western hemlock) sampled in 1993 from the western side of the states of Oregon and Washington. Average DBH of these trees was 37.1 cm (range 8.8–92.5 cm) and 36.5 cm (range 16.3–102.1 cm) for Douglas-fir and western … WebThe maximum height depends on a number of factors such as where the tree is grown and the growing conditions, but primarily on the species. There are reports of Christmas trees … WebHeight: The Douglas fir can grow to be very tall indeed. It can grow up to 60 metres in Britain. Leaves: It has soft needles with two grey bands underneath. Seeds: The oval shaped cones hang downwards with a … jedis key 模糊查询