DEFINITIONS 



Following are definitions of terms used in this report: 



Area Glasses 



Forest land is land bearing forest growth or land from which the 

 forest has been removed but which shows evidence of past forest 

 occupancy and which is not now in other use. 



Commercial forest land is forest land bearing or capable of bear- 

 ing timber of commercial character and economically available now 

 or prospectively for commercial use and not withdrawn from such use. 



Noncommercial forest land is (l) commercially valuable forest land 

 actually withdrawn from commercial use for parks , reserves, wilder- 

 ness areas, etc., and (2) remote and inaccessible alpine areas, and 

 other land which owing to very low productivity, excessively poor 

 quality timber or extreme inaccessibility appears to be permanently 

 out of the commercial timber-producing class. 



Softwood forest consists of stands with 25 percent or more of 

 ponderosa pine or 50 percent or more of other coniferous species. 

 (Based on cubic-foot volume.) 



Hardwood forest consists of stands with less than 25 percent of 

 ponderosa pine and 50 percent or more hardwood species. (Based on 

 cubic-foot volume . ) 



Stand-size Classes 



Saw-timber stands include stocked areas with a plurality of the 

 total net cubic volume in trees 11.0 inches and larger in diameter 

 and generally with 2,000 board feet per acre or more in saw-timber 

 trees. 



Pole stands include stocked areas in which a plurality of the total 

 cubic-foot volume is in trees from 5.0 inches in diameter to saw- 

 timber size. 



Seedling-sapling stands include stocked areas in which the plurali- 

 ty of the total cubic-foot volume is in trees less than 5.0 inches 

 in diameter. 



Poorly stocked and denuded stands include areas with less than: 

 (a) 2,000 board feet per acre, (b) 10 percent stocking of pole 

 trees, and (c) 10 percent stocking of seedling- sapling trees. 



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