Forest management type—A classification of timberland 
based upon the species and source of trees forming a 
plurality of live trees present. 
Forest Survey—A survey conducted by the U.S. Depart- 
ment of Agriculture, Forest Service that provides a 
continuing inventory of the area, location and condition of 
forest lands, amounts and quality of timber volumes 
available, rates of timber growth, timber removals and 
mortality, ownership of forest land timber, and trends in 
timber consumption. 
‘*Fourth forest’’—The forest that will exist in the decades 
beyond 2000, after the harvest or clearing of the third 
forest—the one that now exists in the South. 
Fuelwood—The wood—roundwood and byproducts—used 
for cooking, heating, and power generation. 
Growing stock—Live sawtimber trees, poletimber trees, 
saplings, and seedlings on timberland meeting specified 
standards of quality or vigor; excludes cull trees. 
Growing stock volume—Net volume in cubic feet of live 
sawtimber and poletimber trees on timberland from stump 
to a minimum 4-inch top (central stem) outside bark or to 
the point where the central stem breaks into limbs. 
Hardwoods—Dicotyledonous trees, usually broad-leaved and 
deciduous. 
Highly erodible cropland—aAll cropland in Land 
Capability Classes (classifications used by the Soil Conser- 
vation Service to rate the suitability of soils for agricultural 
production) 3e, 4e, 6e, and 7e. 
Industrial roundwood—All commercial roundwood 
products except fuelwood. 
Industrial timber (wood) products—Sawlogs; veneer logs; 
pulpwood; cooperage logs and bolts; piling and poles; mine 
timbers; posts; bolts used for shingles, handles, and wood 
turnings; and panel products and chemical wood. 
Inventory—Net volume in cubic feet of growing stock trees 
5.0 inches in d.b.h and over from a 1-foot stump to a 
mininum 4.0-inch top diameter outside bark of the central 
stem or to the point where the central stem breaks into 
limbs. 
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Local points of delivery—First location to which 
roundwood timber or other timber products are transported 
after harvest, such as concentration yards or rail sidings. 
Marginal cropland and pasture—Cropland and pasture 
that would yield higher rates of return to the owner if 
planted to pine. 
Mixed pine—hardwood—Forests in which 50 percent or 
more of the stand is hardwood, usually upland oaks, and 
southern pines make up 25-49 percent. Common associates 
include upland oak—shortleaf pine in the foothills and 
plateaus; mixed hardwood-loblolly pine on moist sites; and 
scrub oak—longleaf pine in the sand hills of the Carolinas, 
Georgia, and Florida. 
Mortality—The volume of sound wood in trees that have 
died from natural causes during a specified period. 
National forest land—Federal land designated by 
Executive Order or statute as national forests or purchase 
units, and other lands under the administration of the Forest 
Service, including experimental areas and Bankhead—Jones 
Title III lands. 
Natural pine—Forests in which 50 percent or more of the 
naturally established stand is loblolly pine, slash pine, 
shortleaf pine, longleaf pine, or other southern pines singly 
or in combination. Common associates include oak, 
hickory, and gum. 
Net annual timber growth—The net increase in the volume 
of trees during a specified year. Components of net annual 
growth include the increment in net volume of trees at the 
beginning of the specific year surviving to its end, plus the 
net volume of trees reaching the minimum size class during 
the year, minus the volume of trees that died during the 
year, and minus the net volume of trees that became rough 
or rotten trees during the year. 
Nonstocked areas—Timberland less than 10 percent 
stocked with growing-stock trees. 
