Measures and yields of products and residues 



100 



3319 



C 80 



I 



I 



60 - 



40 - 



20 " 



10 



14 



18 



22 



DBH (INCHES) 



Figure 27-23. — Percent increase in red oak sp. and yellow-poplar wood and bark 

 harvested when whole-tree chipping is compared to logging the stem to a 4-inch top. 

 (Drawing after Clark 1978.) 



Based on data collected on 20 timber sales in West Virginia and Virginia, 

 Martin (1976b) prepared a residue yield table (table 16-33) for four cutting 

 practices and various levels of basal area and stand age. Clearcutting for sawlogs 

 only generates the most residues, followed by selection cut, clearcut for sawlogs 

 and other products, and improvement cut. 



