wilderness
Area where the earth and its community of life have not been seriously disturbed by humans and where humans are only temporary visitors.
Subject:
Chapter 23 - Sustaining Terrestrial Biodiversity: The Ecosystem Approach.
utilitarian value
See instrumental value.
Subject:
uneven-aged management
Method of forest management in which trees of different species in a given stand are maintained at many ages and sizes to permit continuous natural regeneration. Compare even-aged management.
Subject:
tree plantation
Site planted with one or only a few tree species in an even-aged stand. When the stand matures it is usually harvested by clear-cutting and then replanted. These plantations normally are used to grow rapidly growing tree species for fuelwood, timber, or pulpwood. See even-aged management. Compare old-growth forest, second-growth forest, uneven-aged management.
Subject:
tree farm
See tree plantation.
Subject:
sustainable yield (sustained yield)
Highest rate at which a potentially renewable resource can be used without reducing its available supply throughout the world or in a particular area. See also environmental degradation.
Subject:
surface fire
Forest fire that burns only undergrowth and leaf litter on the forest floor. See controlled burning. Compare crown fire, ground fire.
Subject:
strip cutting
Variation of clear-cutting in which a strip of trees is clear-cut along the contour of the land, with the corridor narrow enough to allow natural regeneration within a few years. After regeneration, another strip is cut above the first, and so on. Compare clear-cutting, seed-tree cutting, selective cutting, shelterwood cutting.
Subject:
Shelterwood cutting
Removal of mature, marketable trees in an area in a series of partial cuttings to allow regeneration of a new stand under the partial shade of older trees, which are later removed. Typically, this is done by making two or three cuts over a decade. Compare clear-cutting, seed-tree cutting, selective cutting, strip cutting.
Subject:
selective cutting
Cutting of intermediate-aged, mature, or diseased trees in an uneven-aged forest stand, either singly or in small groups. This encourages the growth of younger trees and maintains an uneven-aged stand. Compare clear-cutting, seed-tree cutting, shelterwood cutting, strip cutting.
Subject:
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