| A | B |
|---|
| board foot | a unit of wood 1 inch thick, 12 inches long, and 12 inches wide. This contains 144 cubic inches of wood |
| basal area | a measurement of the cross-sectional area of a tree trunk in square feet at breast height. |
| area sensitive species | plants or animals with very specific habitat requirements that are susceptible to population decline when their habitat is altered |
| biological maturity | the point in the life cycle of a tree at which there is no longer any net biomass accumulation; the stage before decline when annual growth is offset by breakage and decay |
| browse | portions of woody plants |
| canopy | the upperlevel of a forest |
| clearcutting | a harvesting and regeneration technique that removes all the trees |
| corridor | a strip of wildlife habitat |
| convert | a geographic unit of cover for wildlife |
| crop tree | traditionally reserved to describe a tree of a commercially desirable species |
| crown class | evaluation of an individual tree's crown in relation to its position in the canopy |
| cull | tree of such poor quality that it has no marketable value |
| den tree | tree with cavities |
| economic maturity | life cycle of a tree |
| edge | boundary between open land and woodland |
| emergent wetlands | class of wetlands |
| diameter-limit cut | timber harvesting treatment |
| endangered species | species in danger of extinction throughout all or a significant part of their range |
| even-age stand | group of trees that do not differ in age by more than 10 to 20 years or by 20 percent of the rotation age |
| forest | biological community made up of trees and other woody plants |
| fragipan | dense and brittle pan, or layer, or soil |
| girdling | method of killing unwanted trees by cutting through the living tissues around the bole |
| high granding | type of timber harvesting |
| improvement cut | any cutting treatment used to alter species composition and tree spacing to realize ownership objectives |
| old-growth | forests that approximate the structure, composition, and functions |
| regeneration | replacement of one forest stand by another |
| release | removal of overtopping trees to grow in response to increased light |
| residual stand | trees remaining following a cutting operation |
| salvage cut | removal of dead, damaged, or diseased trees |
| sapling | small tree |
| sawlog | log large enough to yield lumber |
| second growth | forest re-established following the removal of virgin wood |
| seed tree cut | regeneration cut where mature trees are left standing in a harvested area to provide seed for regeneration of the cut-over site |
| seedling | young tree originating from seed that is less than 4 feet tall and smaller than 2in. in diameter at ground level |
| selection cut | regeneration designed to create and perpetuate an uneven-age forest |
| shelterwood | regeneration cut designed to stimulate reproduction |
| silviculture | art, science, and practice of establishing, tending, and reproducing forest stands |
| stand | grouping of vegetation sufficiently uniform in species composition, age , and condition |
| stewardship | wise management and use of forest resources to ensure their health and productivity for the future with regard for generations to come |
| thinning | removal of trees to encourage growth of other selected trees |
| timber cruising | the process of estimating the quality |
| timber stand improvement | combination of intermediate treatments designed to improve growth and composition of the forest |
| understory | smaller vegetation within a forest stand |
