TIMBER RESOURCES OF NORTH AMERICA AND THEl WORLD 



335 



FIGURES SHOW AREA IN MILLION ACRES-1953 



PRIVATE 



62 



OCCUPIED PUBLIC LAND 



141 



NONCOMMERCIAL 



.422 



UNOCCUPIED PUBLIC LAND 



231 



NAT'L AND PROVINCIAL RESERVES 



55 



NAT'L AND PROVINCIAL PARKS 



40 



Figure 104 



Of the accessible board-foot volume, 70 percent 

 is found in British Columbia (table 188). In this 

 Province is concentrated the large-size Douglas- 

 fir, hemlock, and cedar timber. Current high- 

 quality lumber imports into the United States are 

 largely dependent upon this resource. Viewed 

 from another angle, this concentration of saw- 

 timber in British Columbia indicates that else- 

 where trees of smaller size predominate. Canada's 

 forest resource, therefore, both as to species com- 

 position and size class of timber, is admirably 

 suited to support an extensive and highly developed 

 pulp and paper industry. 



Information on Timber Growth and 

 Mortality Is Generally Lacking 



Such information on annual timber growth as 

 is available pertains to timber on 190 million acres 

 of commercial forest land under exploitation. For 

 this portion of the resource, net annual growth 

 in 1952 was estimated to be 2.4 billion cubic feet. 

 If the stands were comparable over the entire 

 529 million acres of commercial forest land, net 

 annual growth would be about 6.6 billion cubic 

 feet. However, much of the area not under ex- 



