462 



Forestry Quarterly 



Contents of Stands and Trees 



If we apply a Yellow pine volume table to the trees in the 

 various density classes, we get some interesting results : 



TABLE 7 



Trees per Acre, 



All Diameters 

 Class From Table 2 



Very open I 6.8 



Open II 14.4 



Medium Ill 17.9 



Dense IV 26.1 



Very dense V 39 . 7 



Average 14.8 



Maximum acre 80. 



To show how the volume of the stand is distributed in the 

 various age classes and to give an idea how much of our merchant- 

 able timber is in the form of mature and over-mature trees, the 

 following table is offered : 



TABLE 8 



Total 



Stand 



per Acre 



Very open I 12,140 



100% 

 Open II 15,385 



100% 

 Medium Ill 15,840 



100% 

 Dense IV 17,375 



100% 

 Very dense V 24,595 



100% 



Average 14,815 



* This corresponds very nearly to the average figures secured in the recon- 

 naissance computations. 



^ This would make the average Yellow pine for the area examined 28 inches 

 D.B.H., with five logs, and from this we can figure that the logs in the Yellow 

 pine type run on the average of 5 per M ft. B.M. 



This is based on 10,360 trees calipered. 



' It is very evident that this table does not show a true condition of aflfairs. 

 It is based on the number of trees per acre and a large number of trees per 

 acre does not necessarily mean a heavy stand. But here, as elsewhere, it is 

 significant that young growth from 6-20 inches is the most important factor 

 that determines the density of stands. 



