Pinyon-juniper — Forests in which pinyon pine 

 and/ or juniper comprise a plurality of the 

 stocking. 



Growing stock trees — Live sawtimber trees, pole- 

 timber trees, saplings, and seedlings meeting speci- 

 fied standards of quality or vigor; excludes cull 

 trees. 



Growing stock volume — Net volume in cubic feet of 

 live sawtimber and poletimber trees from stump to 

 a minimum 4-inch top (of central stem) outside 

 bark or to the point where the central stem breaks 

 into limbs. 



Growth — See definition for "net annual growth." 



Hardwoods — Dicotyledonous trees, usually broad- 

 leaved and deciduous. 



Indian lands — Tribal lands held in fee by the Federal 

 Government but administered for Indian tribal 

 groups and Indian trust allotments. 



Industrial wood — All commercial roundwood prod- 

 ucts except fuelwood. 



Inland waters — Lakes, reservoirs, and ponds over 2 

 acres in size and all waterways. 



Land area — The area of dry land and land temporar- 

 ily or partially covered by water such as marshes, 

 swamps, and river flood plains (omitting tidal flats 

 below mean high tide); streams, sloughs, estuaries, 

 and canals less than 1/8 of a statute mile in width; 

 and lakes, reservoirs, and ponds less than 40 acres 

 in area. 



Logging residues — The unused portions of pole- 

 timber and sawtimber trees cut or killed by logging. 



Mortality — The volume of sound wood in live trees 

 that have died from natural causes during a speci- 

 fied period. 



National Forest System land — Federal lands which 

 have been designated by Executive Order or stat- 

 ute as National Forests or purchase units, and 

 other lands under the administration of the For- 

 est Service including experimental areas and 

 Bankhead-Jones Title III lands. 



Net annual 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 surviv- 

 ing 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. 



Net volume in board feet — The gross board-foot 

 volume of trees less deductions for rot or other 

 defect affecting use for lumber. 



Net volume in cubic feet — Gross volume in cubic feet 

 less deductions for rot, roughness, and poor form. 



Volume is computed for the central stem from a 

 1-foot stump to a minimum 4.0-inch top diameter 

 outside bark, or to the point where the central 

 stem breaks into limbs. 



Noncommercial species — Tree species of typical 

 small size, poor form, or inferior quality which 

 normally do not develop into trees suitable for 

 industrial wood products. 



Nonforest land — Land that has never supported 

 forests and lands formerly forested where use for 

 timber management is precluded by development 

 for other uses. (Note: Includes areas used for 

 crops, improved pasture, residential areas, city 

 parks, improved roads of any width and adjoining 

 clearings, powerline clearings of any width, and 1- 

 to 40-acre areas of water classified by the Bureau 

 of the Census as nonforest land. If intermingled in 

 forest areas, unimproved roads and nonforest 

 strips must be more than 120 feet wide, and clear- 

 ings, etc., more than 1 acre in size, to qualify as 

 nonforest land.) 



Nonpoint pollution sources — Those sources of pol- 

 lution that are diffuse in both origin and in time 

 and points of discharge, and depend heavily on 

 weather conditions such as rainstorms or snow- 

 melt. Pollutants can originate on natural source 

 areas as well as areas affected by man's activities. 



Off-road vehicles (ORV's) — Vehicles such as motor- 

 cycles, all-terrain vehicles, fourwheel drives, and 

 snowmobiles. 



Other Federal land — Federal land other than lands 

 administered by the Forest Service or the Bureau 

 of Land Management. 



Other forest Land — Forest land incapable of pro- 

 ducing 20 cubic feet per acre of industrial wood 

 under natural conditions because of adverse site 

 conditions such as sterile soils, dry climate, poor 

 drainage, high elevation, steepness, or rockiness. 



Other land — All land area other than forest and 

 range land. 



Other private land — Privately owned land other 

 than forest industry or farmer-owned. 



Other public land — Publicly owned land other than 

 National Forest System lands. 



Other removals — The net volume of growing-stock 

 trees removed from the inventory by cultural 

 operations such as timber-stand improvement, by 

 land clearing, and by changes in land use such as a 

 shift to wilderness. 



Ownership — The property owned by one owner, 

 including all parcels of land in the United States. 



Pasture — Land which is currently improved for 

 grazing by cultivation, seeding, fertilization, or 

 irrigation. 



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