INCREASING THE YIELD. 



37 



FIG. 5. A virgin stand of mixed hardwoods which contains a large proportion 

 of yellow poplar. The merchantable trees in this stand of other species, as 

 well as yellow poplar, are mostly of very large size. The small trees in the 

 stand are suppressed or specimens of small tolerant species. This stand re- 

 quires cutting clean except for seed trees. It will be necessary to destroy the 

 heavy undergrowth of trees and shrubs which are tolerant of shade in order 

 to be assured of a large proportion of yellow poplar in the restocking. (Photo 

 Forest Service.) 



