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Basal area 1) Of a tree: the cross-sectional area (in square feet) of the trunk at breast height (4.5 feet above the ground). For example, the basal area of a tree 14 inches DBH is approximately 1 square foot. 2) Of an acre: the sum of basal areas of the individual trees on the acre. A well-stocked northern hardwood stand might contain 80 to 100 square feet of basal area per acre.

Block An area of woodland based on geographic boundaries, tree species composition, timber products, accessibility, or other stand characteristics.

Board foot A unit for measuring wood volumes equaling 144 cubic inches. It commonly is used to measure and express the amount of wood in a tree, sawlog, veneer log, or individual piece of lumber. For example, a piece of wood 12 inches x 12 inches x 1 inch and one measuring 12 inches x 3 inches x 4 inches each contains 1 board foot of wood.

Bole The main trunk or stem of a tree.

Bolt A short log or a squared timber cut from a log, commonly 8 feet long.

Broadcast burn A controlled fire that is set purposely to burn across an area and eliminate woody debris and undesirable small trees and shrubs.

Browse Growing leaves, shoots, or twigs used as animal fodder. As a verb, to feed on leaves, shoots, or twigs.

Buck The process of cutting a tree stem into logs.

Burl An abnormal growth of woody tissue protruding outward from a tree stem. Usually rounded in shape.

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