CONTMTS 



Page 



Introduction 1 



Study Methods and Bases 2 



Adequacy of bases U 



Computation Procedure U 



Tree classification U 



Stvimp heights U 



Log lengths 5 



Top diameters 5 



Log rules employed ;...... 6 



Causes and Types of Cull 6 



Fungi causing cull 10 



Cull Indicators 13 



Reliable indicators of cull ...... 13 



Sitka spruce 13 



Western hemlock . . ' 13 



Western redcedar lU 



Non-indicators of cull lii 



How to use indicators Ill 



Cull Factors 19 



Flat factors 19 



Indicator factors 21 



Elevation-Cull Relationship 25 



Age-Cull Relationship '. . . . 26 



