A NATIONAL PLAN" FOR AMERICAN FORESTRY 935 



CONDITION OF TYPICAL TIMBER STANDS AND MANAGEMENT METHODS 



SUGGESTED 



The private-forestry possibilities of the region fall almost entirely 

 within two forest types the western white pine mixed with other 

 conifers, occurring principally in northern Idaho, western Montana, 

 and northeastern Washington ; and the ponderosa pine type, which is 

 distributed in numerous localities throughout the region. 



WESTERN WHITE PINE 



No data are available for an average example of the western white 

 pine type. The stand shown in figure 10 and table 11 is unusually 

 heavy, having 12,332 cubic feet of western white pine and 11,608 

 cubic feet of western red cedar, western hemlock, and western larch, 

 or 23,940 cubic feet in all (21). It is a very interesting example of an 

 association of species having complementary characteristics such as 

 the shallow rooting and shade endurance of hemlock and cedar and 

 the somewhat deeper rooting habit and need for full light of the pine 

 and larch. On areas occupied by such associations the fullest possible 

 use is made of the site, and vegetative activity is confined almost 

 entirely to the growth of the tree species. For these reasons the 

 stands pile up a very heavy wood volume per acre ; the volume in this 

 case exceeds that in most of the examples given for the heavy Pacific 

 Coast forests. If the forest is broken up into the selective form it is 

 necessary to provide for a permanently heavy stocking. Unless 

 stocking is maintained, the productivity of the site will be diverted 

 to shrubs and to seedlings and saplings of the inferior species. 



168342 33 vol. 1 60 



