Basal Area (BA):
(individual tree) the cross-sectional area of a single stem, measured at breast height (4.5 above the ground); (per acre) the sum of the basal areas of the trees on an acre; measure of forest density.
Boardfoot (Bd Ft):
the amount of wood contained in a board 1 thick, 12 long, and 12 wide.
the ability of tree to grow in shade, some tree have little shade tolerance, e.g. aspen, others are very tolerant, e.g. American beech.
silvicultural treatment that removes about half of the overstory basal area. This treatment is used to regenerate tree species that prefer semi-shaded environment, as opposed to full sun. Once regeneration is established, the remaining overstory may be removed.
the art and science of growing trees on a sustainable basis.
Single Tree Selection:
silvicultural treatment that removes individual trees of all size classes throughout the stand. Remaining trees are then provided enough space to regenerate and move into the overstory. This treatment is popular among landowners, but not appropriate for many forest systems that require more light to reach the forest floor to regenerate desirable tree species. Furthermore, if implemented incorrectly, this treatment can easily turn into highgrading.
average height of dominant and co-dominant trees of a single species at a given (base) age for an even-aged stand. Site index is used as a proxy for site quality.
manipulation of site, either by hand or mechanized equipment that is designed to improve tree regeneration.
process of dragging downed trees or logs to a processing area.
the excess material, e.g. treetops and limbs, that is left on the ground following a silvicultural treatment or as a result of a storm.
term for coniferous trees, e.g. pines, firs, larch, as well as species such as juniper and yews.
area of timberland that is either contiguous in vegetation type or marked by distinguishable landscape characteristics, such as a road, ridge, stream, etc.
a measure of growing stock commonly expressed in terms of number of trees, basal area, or volume per unit area.
the value of standing trees in a forest.
price paid for standing trees, i.e. before they are cut down.