212 METHODS OF CONTROLLING CUTTINGS 



be given to what constitutes merchantability in that particular 

 locality. Local conditions governing the logging operations 

 or existing in the available markets may neccessitate two 

 different sets of standards, as to minimum top diameters, 

 maximum height of stumps, and extent to which dead and 

 down material can be utiUzed, for operations only a few miles 

 apart. 



Destruction of the unmerchantable growing stock is of more 

 vital silvicultural importance than the other classes of waste. 

 Reduction in the growing stock, from reproduction right on 

 up to trees just under merchantable size, is Kkely to result in a 

 lower production in the future crops. The lumberman, as 

 such, rarely is interested in saving the unmerchantable grow- 

 ing stock at the expenditure of any trouble or actual outlay. 

 Where unmerchantable trees will reach merchantable size 

 within a few years he may see a fairly early profit in saving 

 such trees, but in reproduction and young growth as a whole 

 he has no interest. Intention to practice silviculture must 

 exist if the unmerchantable growing stock is to receive pro- 

 tection. 



A certain portion of the unmerchantable growing stock may 

 have to be sacrificed in the logging operation. This will de- 

 pend upon the difficulties of logging, the quantity and location 

 of the young trees and the intensity of the silviculture. The 

 proportion which must be sacrificed should be determined in 

 advance of the cutting and destruction kept within prescribed 

 limits. 



Destruction of the unmerchantable growing stock was 

 stated on page 211 to be carried on either for material to use 

 in the logging operations or to facilitate these operations. 



Material for use in logging operations is taken from the 

 young trees for skids, construction of skidways, corduroy 

 roads, and other logging requirements. This material is essen- 



