200 



300 400 500 

 AGE ( yeors) 



600 



700 



800 



Fig. 22. — Relationship of tree age to board-foot cull in the sawlog 

 portion of the bolej percent of gross ■board-foot vol\jme that is 

 cull, from the stump to the utilized top, Sitka spruce, western 

 hemlock, and western redcedar in Southeast Alaska. 



-27- 



