Measures and yields of products and residues 3323 



material greater than 3 inches in diameter outside bark increased from 56 percent 

 to 75 percent as dbh increased from 1 1 to 26 inches. Moisture content averaged 

 62 percent (ovendry basis) for the trees sampled. 



A study of nine Appalachian species in West Virginia (Wiant et al. 1977) 

 showed that northern red oak, black oak, scarlet oak, chestnut oak, and hickory 

 sp. generally have high branch weights, while white oak, black cherry, red 

 maple, and yellow-poplar have lower branch weights. Branch weights, green 

 and dry, for trees 6 to 16 inches in dbh are given in tables 27-131 and 27-132. 

 For dry weight of branch wood and stemwood in these trees see table 16-12; dry 

 weights of branchbark and stembark are given in table 13-11. 



Equations 27-30 and 27-32 predict the weight of the unmerchantable top, 

 limbs, and foliage for mixed hardwood sawtimber and for mixed hardwood 

 pulptimber, as determined in a Louisiana study (Hughes 1978). 



Equation 16-4 and table 16-13 can be used to predict the crown weight (green 

 or ovendry) from basal area and tree height for green ash, sugarberry, sweet- 

 gum, and American elm. Alternatively, crown weight (green) can be predicted 

 from a knowledge of dbh and crown length using equation 16-5 for green ash, 

 sugarberry, or sweetgum. 



For black oak, total crown weight and the weight in limbs of various sizes can 

 be estimated with the equations in table 27-8 1 . Values for trees 1 2 to 36 inches in 

 dbh are listed in tables 16-14 and 16-15. 



Tabular data on crown weights of wood and bark in five important southern 

 oaks are located as follows: 



Table number for 

 Species Sample location Wood Bark 



Chestnut oak Western North Carolina 16-16 16-17 



Northern red oak* Western North Carolina 16-20, 16-21 13-13, 13-14 



Scarlet oak Tennessee Cumberland Plateau 16-22 13-15 



Southern red oak Highland Rim in Tennessee 16-23 13-16 



White oak Western North Carolina 16-24 13-17 



For additional weight data on mockernut hickory and white ash see: Clark, 

 Alexander, III, and W.H. McNab. 1982. Total tree weight tables for mockernut 

 hickory and white ash in north Georgia. Ga For. Res. Pap. 33. Macon, Ga.: 

 Georgia Forestry Commission, Research Division. 



Equations are available to predict total branch weight for yellow-poplar (table 

 16-29), and values for trees 6 to 28 inches in dbh are listed in tables 27-133 and 

 27-134. Yellow-poplar branches make up 7 to 12 percent of the dry weight of the 

 above-ground foliage-free tree, depending on tree size (table 16-27). On the 

 average 77 percent of branch dry weight is wood and 23 percent is bark. 



Branch density. — Branch densities vary widely among species and with tree 

 diameter class as indicated by data in the following tables: 



*See also: Loomis, Robert M.; Blank, Richard W. 



How to estimate weights of northern red oak crowns in a stand. 



Gen. Tech. Rep. NC-76 St. Paul, MN: U.S. Department of Agriculture, Forest 

 Service, North Central Forest Experiment Station; 1982. 8 p. 



