Except for pecan, hickory is largely an upland, dry-site species group, 

 and because of its deep root system and the accompanying habit of growth, 

 the hickory group is characterized as full-boled, with relatively little butt- 

 log taper. Because of the thick bark in some species, the butt- log form 

 quotient (Girard form class) for the group probably averages around 0,78. 



Tables 2, 3, and 4 give estimated tree volumes in board-feet of hickory 

 species in three different geographic areas and in two different scales. The 

 author of the Lake States and the Kansas tables, S. R. Gevorkiantz (2), indi- 

 cates, "The trees in the Lake States region have a slightly better form class 

 (0.79) because of the slightly thinner bark and less pronounced butt- swell. 

 The form class of the Kansas trees averaged around 0.78. . .hickories there 

 (Kansas and Missouri) generally ran much larger in diameter but less in 

 merchantable height than the northern hickories." The volumes in table 4 

 for the Ohio trees are somewhat lower than those for the Lake States hickories, 



Table 2. -- Volume tables for hickories,—^ Wisconsin and Michigan 



SCRIBNER SCALE 



D.b.h. 



Merchantable height above stump in feet -^ 



Basis 



(inches) 



10 



20 



30 



40 



50 



(trees) 





21 



- - - - V WXL 



iiiic ill uwai 



<_i- icci, - - - 







10 



40 



55 



65 



18 



12 



36 



62 



83 



98 



114 



32 



14 



51 



88 



118 



142 



168 



15 



16 



-- 



118 



159 



196 



230 



3 



18 



-- 



-- 



201 



256 



300 



-- 



Basis 















(trees) 



11 



28 



24 



5 





68 



INTERNATIONAL (i) SCALE 



10 



26 



47 



63 



75 



-- 



18 



12 



43 



73 



98 



116 



134 



32 



14 



60 



102 



136 



166 



194 



15 



16 



-- 



129 



178 



226 



263 



3 



18 



-- 



-- 



227 



288 



338 



-- 



Basis 















(trees) 



11 



28 



24 



5 





68 



jy Compiled for use in the Forest Survey of the Lake States {6). 

 2/ Volume above stump to usable top, i.e., the point on the stem at which 

 merchantability for sawtimber is limited by branches, deformity, defect, 

 or by a diameter of less than 8.0 inches. Stump height: 1 foot up to 18 

 inches d.b.h.; 2 feet over 18 inches d.b.h. 



- 3 



