3286 



Chapter 27 



10 12 14 16 18 20 22 24 



TREE DIAMETER BREAST HIGH (INCHES) 



26 



Figure 27-1 2B. — Ratio of board-foot volume by the International y4-inch scale to cubic 

 feet in entire bark-free stems of upland oak trees from the Sinnissippi National Forest 

 in Illinois. (Drawing after Jokela and Lorenz 1957.) 



10 



12 14 16 18 20 22 



TREE DIAMETER BREAST HIGH (INCHES) 



24 



Figure 27-1 2C. — Ratio of board-foot volume by the International Va-inch log scale to 

 cubic feet in entire bark-free stems of upland oak trees sampled in Kentucky, Missou- 

 ri, Ohio, Indiana, and Illinois. (Drawing after Hilt 1980.) 



does height. Also, the larger the dbh, the less effect total height has on the ratio. 

 Equation 27-40 and table 27- 1 1 3 are based on 204 sample trees measured in the 

 southern Appalachians; saw log utilization (and cubic volume computation) was 



