THE WHITE PINE REGION 



305 



The yield tables secured by these three investigations do not 

 agree exactly for reasons to be shown later. The following yield 

 table has been compiled from all three sources and will bring out 

 their differences. The figures most applicable to any particular 

 case should be the ones used. 



It will at once be seen that the Massachusetts figures for 

 feet, board measure, are much higher throughout than the New 

 Hampshire data. This is partly to be explained by closer 



Fig. 108. — In the center is seen good reproduction of white pine on an old field bordering 

 the Connecticut River. The seed comes from the neighboring seed woods at the left 

 and right of picture. 



utilization of the trees in the Massachusetts section as con- 

 trasted to the New Hampshire section. This, however, cannot 

 explain the entire difference, which must be accounted for through 

 variation in the character of the timber and lack of a sufficiently 

 large amount of data. If a much larger number of trees and 

 plots were secured in each of the two localities probably the 

 results would be nearer aHke. 



In comparing the yield in cords secured in Massachusetts with 

 that obtained by the United States Forest Service for the region 



