20 
prices for ash for the various average widths of the lumber, 
the fractional values given for oak in Table X have been used. 
These have been multiplied by the board feet per acre to 
obtain what has been called the relative value per acre. The 
yield per acre is considered as consisting wholly of 2” plank. 
The results are given in Table XII. 
TABLE XII. ASH 
D.B.H. Fractional Board Feet Relative Value 
Inches Value Per Acre Per Acre 
8 1/5 28,600 5,720 
9 3/10 26,800 8,040 
10 3/5 23,600 14,160 
11 3/5 24,000 14,400 
12 4/5 22,400 17,920 
13 9/10 22,100 19,890 
The largest diameter class has the greatest relative value, 
and the relative value increases from the smaller diameter 
classes upwards. From Table XII it is apparent that the 
most profitable diameter class to produce is the largest. The 
number of trees having a diameter of 13” at seventy years was 
very small and, therefore, it is at present doubtful if that 
diameter could be generally produced at that age. The 12” 
class is frequent and, therefore, we may at present consider 
this to be the ideal diameter to be produced in seventy years. 
In Table XIII is given the average width of lumber from 
the oak according to lengths of bole and diameters given in 
Table VIII. 
TABLE XIII. OAK 
Av. Width Yield Per Acre 
D.B.H. 23” Plank Board Feet 
11 6.4 23,000 
12 7.3 19,100 
13 8.1 17,700 
14 8.8 16,400 
15 9.5 15,700 
16 10.2 14,900 
17 10.9 13,400 
18 11.5 13,100 
19 12.1 11,650 
20 12.7 10,700 
