originated since 1949 have 1,000 or more 

 excess trees per acre, as follows: 



Excess trees 



Thousand 



per acre 



acres 



Less than 199 



71 



200 - 499 



44 



500 - 999 



32 



1,000 1,999 



46 



2,000 - 2,999 



13 



3,000 or more 



15 



Total 



221 



Managers may also wish to consider methods 

 of improving wood quality yield by prun- 

 ing. Pruning might help to control dwarf- 

 mistletoe, which infects some nonmerchan- 

 table stands.^ However, the practicability of 

 this method has yet to be demonstrated in 

 this Region. Dwarfmistletoe might also be 

 controlled through eradication of infected 

 and exposed trees during the thinning process. 



^ Flora, Donald F. A method of forecasting returns 

 from ponderosa pine dwarfmistletoe control. U.S. 

 Forest Serv. Res. Pap. PNW-37, 17pp. 1966. 



Some nonmerchantable stands are residual 

 stands of cull timber. Included in the forest 

 on white pine land are 83,000 acres supporting 

 stands containing 3,000 cubic feet or more 

 per acre of cull sawtimber. Some of this land 

 is excellent for timber production — site class 

 80 or better; about half is site index 60 or 

 better: 



Site class 



80+ 



70 



60 



50 



40 



Total 



Thousand acres 



10 

 12 

 17 

 23 

 21 



83 



The site class for most of this land is based 

 on measurement of old residual cull trees, 

 which usually results in an underestimate of 

 site. In many instances these cull stands can 

 be removed inexpensively under salvage con- 

 tracts, making the land available to grow a 

 new crop. In others, it may be possible to fell 

 and burn residual stands so that the land can 

 be used. 



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