THE TREE AND ITS FORMS. 



31 



Table 5 gives figures of height growth of a few carefully selected 

 trees growing under soil conditions similar to those of the trees given 

 in Table 4. 



TABLE 5. Height growth of various hickories. 



This explains why the trees in the Cumberland Mountains and in 

 the Mississippi Valley, in spite of better soil conditions, show a slower 

 growth. The figures given for the Cumberland Mountains and the 

 Mississippi Valley are from trees in the virgin forest ; those for the Ohio 

 Valley and for northern Ohio are from second-growth trees. Under 

 forest management the growth of trees in these regions should be 

 faster than in the Ohio Valley and in northern Ohio. 



Coppice hickory of merchantable size is scarce. Table 6 is based 

 on measurements of 16 pignuts and 6 shagbarks growing in rather dry 

 situations, on red clay soil, both near Bardstown, Ky., and Paoli, Ind. 

 Under more favorable conditions the growth should be considerably 

 faster. 



TABLE 6. Height and diameter growth of pignut and shagbark coppice. 



