Measures and yields of products and residues 3463 



Table 27- 1 30. — Regression statistics for equations^ developed to predict weights of tops 

 of Appalachian hardwoods^ (Wartluft 1978) 



w (pounds) for 

 class and portion 



of tree bo b, S.E. r^ 



Soft hardwoods 



Total treetop green weight 5. 122 0. 1090 0.400 0.51 



Total treetop oven-dry weight 4.530 . 1092 .379 .53 



>3 inch treetop green weight 4.320 .1300 .458 .53 



>3 inch treetop oven-dry weight 3.746 .1301 .432 .56 



Hard hardwoods 



Total treetop green weight 5.506 . 1 129 .345 .70 



Total treetop oven-dry weight 4.951 . 1 174 .348 .71 



> 3 inch treetop green weight 4.700 .1326 .402 .70 



>3 inch treetop oven-dry weight 4. 166 .1358 .403 .71 



Mixed hardwoods 



Total treetop green weight 5.392 . 1 132 .404 .60 



Total treetop oven-dry weight 4.818 . 1 173 .428 .59 



> 3 inch treetop green weight 4.590 .1331 .450 .63 



>3 inch treetop oven-dry weight 4.038 .1360 .463 .62 



'All equations are of the form: 'n w = bg + bjdbh, where dbh is diameter at breast height in 

 inches and 'n is the natural logarithm function. 



^Data collected in three oak-hickory stands in southern West Virginia and southwestern Virginia. 



Table 27-131 . — Green weight of branches, bark included, per tree of six diameters and 

 eight species sampled in West Virginia (Wiant et al. 1977)* 



Tree dbh, inches 



Species 6 8 10 12 14 16 



- Pounds 



Hickory, sp 87 153 281 472 726 1,043 



Maple, red 120 186 267 365 478 608 



Oak, black 97 181 294 437 612 818 



Oak, chestnut 91 148 249 396 588 825 



Oak, northern red 133 212 328 481 670 896 



Oak, scarlet 107 173 289 456 673 940 



Oak, white 77 122 208 335 503 712 



Yellow-poplar 52 46 87 176 311 493 



'Branches include topwood and limbs smaller than 4 inches in diameter outside bark. Data are 

 based on 19 to 22 trees of each species. 



^See table 13-11 for dry weight of branchbark and stembark of these trees; table 16-12 gives dry 

 weight of their branch wood and stem wood. 



