Other state lands 



State land other than state forests, land board, and Fish, Wildlife, and 

 Parks. 



Ownership class 



The finest level of ownership used in this report. The classes are: 

 miscellaneous federal, Department of State Lands-Classified Forest Land 

 and Classified Grazing Land, county and municipal, Montana Department 

 of Fish, Wildlife and Parks, other state, forest industry, farmer-ran- 

 cher, other private corporate, and other private individual. 



Ownership group 



Convenient groups of ownership classes. The groups are: State and 

 other public, forest industry, and other private. 



Poletimber stands 



Stands at least 16.7 percent stocked with growing stock trees of which 

 50 percent or more of this stocking is in pole timber and/ or sawtimber 

 trees, and with pole timber stocking exceeding that of sawtimber. 



Pole timber trees 



Trees at least 5.0 inches in diameter at breast height but smaller than 

 9.0 inches for softwoods and 11.0 inches for hardwoods. 



Potential growth 



Or yield capability is defined as mean annual increment of growing stock 

 attainable in fully stocked natural stands at the age of culmination of 

 mean annual increment. When expressed in cubic feet of growing stock, 

 unless specified otherwise, the volume figure includes all surviving live 

 trees 1.0 inches d.b.h. and larger, for most tree species. See Brickell 

 (1970) for further information. 



Precommercial thinning 



A thinning in which the cut trees are too small to be removed and util- 

 ized. 



Productive-reserved forest land 



Forest land sufficiently productive to qualify as commercial forest land, 

 but withdrawn from timber utilization through statute, administrative 

 designation, or exclusive use for Christmas-tree production. 



Rotation 



The period of years between establishment of a stand of timber and the 

 time when it is considered ready for cvitting regeneration. 



Rotten trees 



Live trees of commercial species that do not contain at least one 12-foot 

 sawlog or two noncontiguous sawlogs, each 8 feet long or longer, now or 

 prospectively and/ or do not meet regional specifications for freedom from 

 defect primarily because of rot; that is, when more than 50 percent of 

 the cull volume in a tree is rotten. 



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