3270 



Chapter 27 



K 



Uj 84 



Uj 



k 80 



76 



1 72 

 ^ 68 

 O 64 

 ^ 60 



56 

 52 

 ft 48 

 *^ 44 

 40 

 36 

 32 

 28 

 24 

 20 

 16 

 12 



8 - 

 4 - 



I 1 T 



SITE INDEX 100 

 (50 -YEAR) 



50 100 150 200 250 300 350 



NUMBER OF TREES PER ACRE 



Figure 27-7. — In yellow-poplar stands, total cubic-foot volume of wood and bark per 

 acre (in stems from 1 -foot stump to apical tip) increases with number of trees. In older 

 stands the rate of increase declines sharply after the first 1 00 trees per acre. (Drawing 

 after Beck and Della-Bianca 1970.) 



Wiant and Wingerd (1981) suggest an average weight of 5,809 pounds for a 

 green cord of Appalachian hardwoods comprised of a typical species mix. 

 Taras' (1956) average was very similar — 5,758 pounds per cord — and was 

 based on weights in use by various pulp companies throughout the Southeast. 



