412 



FORESTRY IN NEW ENGLAND 



contrast to 149. i cubic feet for spruce, or comparing stands of 

 two qualities having the same species, that spruce on quahty I 

 annually produces 149. i cubic feet per acre, but on quahty V 

 only 19.0 cubic feet. 



Second-growth white pine stands in New England furnish a 

 good illustration of large annual production. Taking the data 

 from the Yield Table for white pine in " The Forest Mensuration 

 of the White Pine in Massachusetts," for stands fifty-five years 

 old, gives the following result: 



YIELD PER ACRE OF WHITE PINE STANDS IN MASSACHUSETTS ^ 

 AT 55 YEARS, IN CUBIC FEET. 



Quality Classes. 



Yield per acre 



Mean annual growth . 



8575 

 156 



7200 

 131 



Cubic feet. 



6015 



109 



1 It should be understood that these figures are for unmanaged forests, while the European 

 figures are for forests which have always been well managed. 



It is easily within the possibilities throughout much of New 

 England to develop forests of white pine and other fast-growing 

 species which will produce annually 100 or more cubic feet per 

 acre, and an average growth of 50 cubic feet is thought to be a 

 very conservative figure of what may be accomphshed through 

 forestry. 



The average quality of the product will be greatly increased, 

 as one of the main objects of forestry is to grow the better grades 

 at the expense of inferior material. Low-grade -material, such 

 as cord wood, must always form an important part of the yield, 

 either as material which is sold, or in undeveloped regions as 

 material which must be left in the forest and wasted. But 

 whereas in an uncared-for forest perhaps 60 per cent of the 

 volume may be low-grade material, ultimately the same forest 

 may be so managed that possibly only 40 per cent of the output 

 is of poor quahty. The results of management in Europe show 



