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The blue spruce (Picea pungens), also commonly known as Colorado spruce or Colorado blue spruce, is a species of spruce tree native to North America in Arizona, Colorado, Idaho, New Mexico, Utah and Wyoming. [4] It is noted for its blue-green colored needles, and has therefore been used as an ornamental tree in many places far beyond its native ...
In the United States, the forest cover by state and territory is estimated from tree-attributes using the basic statistics reported by the Forest Inventory and Analysis (FIA) program of the Forest Service. [2] Tree volumes and weights are not directly measured in the field, but computed from other variables that can be measured. [3] [4]
Sitka spruce: Picea sitchensis: 1962 [2] [3] American Samoa: None [4] Arizona: Blue palo verde: Parkinsonia florida: 1954 [5] [6] Arkansas: Loblolly pine: Pinus taeda: 1939 [7] California: Coast redwood: Sequoia sempervirens: 1937 [8] [9] Giant sequoia: Sequoiadendron giganteum: Colorado: Colorado blue spruce: Picea pungens: 1939 [10 ...
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Site index is a term used in forestry to describe the potential for forest trees to grow at a particular location or "site". Site is defined as "The average age of dominate and/or codominate trees of an even-aged, undisturbed site of intolerant trees at a base age"; [1] furthermore, the word site is used in forestry to refer to a distinct area where trees are found. [2]
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PAI may go negative if a tree loses volume due to damage or disease. Periodic annual increment is commonly used instead of current annual increment as a basis for computing growth per cent . Growth per cent indicates the rate of increase with relation to the wood capital required for its production, this is usually based on a single year's growth.
Trees portal; Tolerance of Tree Species; Silvics of North America, an encyclopedia of characteristics for around 200 tree species native to the United States published by the United States Forest Service. Zeigerwerte der Pflanzen Mitteleuropas (German) Archived 2015-08-07 at the Wayback Machine