DEFINITIONS 



Following are definitions of terms used in this report: 



Area Classes 



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 

 bearing timber of commercial character and economically avail- 

 able now or prospectively for commercial use and not withdrawn 

 from such use. 



Noncommercial forest land is (1) commercially valuable forest 

 land actually withdrawn from commercial use for parks, re- 

 serves, wilderness areas, etc., and (2) remote and inacces- 

 sible alpine areas, and other land which owing to very low 

 productivity, excessively poor quality timber or extreme in- 

 accessibility 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 

 plurality 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) 40 percent stocking of seedling-sapling trees. 



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