76 MISC. PUBLICATION 218, U. S. DEPT. OF AGRICULTURE 
no more than mere protection against fire, young jack pine stands will 
almost certainly yield 20 cords per acre within 40 years.” With a 
$2.50 stumpage price, the value of the total yield will be $50, while an 
annual tax at 10 cents per acre compounded at 5 percent for 40 years 
equals only $12, leaving an ample margin for yield tax and other 
expenses. 
APPLICATIONS 
The formulas for taxes, tax ratios, and the like, which have been 
developed in this chapter are applied in succeeding parts of this report. 
The different tax methods are compared in part 12, tables 159 to 162, 
by means of examples which involve the use of these formulas. 
