THE WHITE PINE REGION 303 



cedar swamps, the following yields for fully stocked stands are 

 recorded : 



Sixty years, 10,000 feet, board measure, and 500 fence rails. 



Eighty years, 20,000 to 25,000 feet, board measure, and 1500 

 fence rails. 



This may be taken as a maximum yield for the type in the 

 white pine region. 



Fig. 107. — An open stand of white pine in good condition. Many of ttie trees, as seen on 

 the left, are two-forked and branchy. The yield is not so good in quantity or quality 

 as can be produced. 



4. Pure White Pine. — Commercially this type is the most 

 important. In area it is exceeded by the mixed hardwoods type 

 and probably also by the pine and inferior hardwoods type. 



Two classes of land may be occupied by the type: abandoned 

 fields and lands once cut clear. Usually the type is confined to 

 small scattered patches. While classed as a temporary type on 

 some situations it is really permanent. This is true on some of 

 the poorer soils which in the original forest bore stands of pure 

 pine. The most suitable soils are sandy or gravelly in nature, 



