YIELD OF ASSOCIATED SPECIES 97 
twenty-five years, assuming that the trees left standing 
will grow one inch in diameter in fifteen years, the 
second cut would yield about 400 board feet per acre. 
If, however, eighteen inches were made the lower limit 
or the first cut, 2440 feet could be taken out now, and, 
in twenty-five years the land would yield 1057 board 
feet per acre if the second cut took all trees down to 
fifteen inches. From these figures it appears that the 
hardwoods, considered as producers of stumpage, are 
far less effective than the Spruce. It should be noted, 
however, that the estimate of yield (p. 116) is based on 
a first cut of but half the standing hardwoods. It is 
therefore certain that in actual practice the second cut 
would be far better than the estimate given above, and 
altogether probable that both in stumpage and in cash 
value it would exceed the first. 
