112 SILVICULTURES-METHODS OF NATURAL REPRODUCTION 



Forest Service has required that these large trees be taken as logs 

 to be sawed into ties by small portable mills; this has resulted in 

 much better silviculture. Usually, saw logs are taken from trees which 

 are over 16 inches d.b.h. Where the trees over hewing size are scat- 

 tered and do not constitute enough volume to justify a tie mill set, 

 the operator is allowed to long-butt these trees and hew the balance 

 of the stem into cross ties. 



