336 



TIMBER RESOURCES FOR AMEIIICA'S FUTURE 



ploitation is occupied by old-growth timber having 

 little if any net growth. Thus, growth per acre 

 on these areas might average only about half as 

 much as on areas now being exploited. Assuming 

 this to be a reasonable conjecture, it is possible to 



derive a very rough total estimate of 4.5 billion 

 cubic feet of net annual growth for all stands 

 combined and an average net growth per acre of 

 8.5 cubic feet. Rough as these estimates are, 

 they apparently are not unrealistic considering 



Table 185. — Volume 



of merchantable timber ^ on commercial forest land in Canada, by species and 

 accessibility class, 1953 



Species 



Total 



Accessible forest land 



Inaccessible forest land 



Softwood: 



Spruce 



Jack and lodgepole pine 



Balsam fir 



Million 



cu. ft. 



150, 231 



45, 583 



62, 106 



27,811 



20, 094 



15, 198 



6,803 



Percent 

 38 



11 

 16 

 7 

 5 

 4 

 2 



Million 

 cu. ft. 

 99,861 

 29, 292 

 40,510 

 19, 620 

 14, 584 

 10, 364 

 5,824 



Percent 



36 



11 



15 



7 



5 



4 



2 



Million 



cu. ft. 



50, 370 



16,291 



21,596 



8,291 



5,510 



4,834 



979 



Percent 

 41 

 13 

 18 



Hemlock 



Cedar 



7 

 4 



Douglas-fir 



4 



Other softwood 



1 



Total 



327, 826 



83 



219, 955 



80 



107, 871 



88 



Hardwood: 



Poplar (aspen) 



37, 482 



21,663 



3,856 



3, 290 



3, 196 



9 

 5 

 1 

 1 

 1 



27, 276 



17, 892 



3,856 



3,290 



2,999 



10 



7 

 1 

 1 

 1 



10, 206 

 3,771 



9 



White birch 



3 



Yellow birch 





Maple 







Other hardwood 



197 









Total _ . _ 



69, 487 



17 



55, 313 



20 



14, 174 



12 







All species 



397, 313 



100 



275, 268 



100 



122, 045 



100 







' All trees 4 inches d. b. h. and over. 



Source: Canada Department of Northern Affairs and 

 National Resources (formerly Department of Resources 



and Development), 

 Amended 1954. 



Forestry Branch. Bulletin 106. 



Table 186. — Volu7ne of sawtimber ^ on commercial forest land in Canada, by species and accessibility 



class, 1953 



Species 



Total 



Accessible forest land 



Inaccessible forest land 



Softwood : 



Spruce 



Jack and lodgepole pine 



Balsam fir 



Hemlock 



Cedar 



Douglas-fir 



Other softwood 



Total 



Hardwood: 



Poplar (aspen) 



White birch 



Yellow birch 



Maple 



Other hardwood 



Total 



.\11 species 



Million 



bd.-ft. 



23 i, 010 



59, 253 



117, 431 



133,038 



92, 032 



70, 978 



20, 143 



723, 885 



33, 000 

 9, 938 

 5,710 

 4,284 

 5, 180 



58, 112 



781, 997 



Percent 



29 



8 



15 



17 



12 



9 



3 



Million 

 hd.-ft. 

 173, 285 

 45,613 

 85,316 

 94,218 

 65, 557 

 49, 608 

 17, 268 



93 



530, 865 



28, 265 

 9, 353 

 5,710 

 4,284 

 4, 195 



51, 807 



100 



582, 672 



Percent 



30 



8 



15 



16 



11 



8 



3 



Million 

 bd.-ft. 

 57, 725 

 13, 640 

 32, 115 

 38, 820 

 26, 475 

 21, 370 

 2,875 



91 



193, 020 



4,735 

 585 



985 



6,305 



100 



199, 325 



Percent 

 29 



7 

 16 

 20 

 13 

 11 



1 



97 



3 

 100 



' All trees 10 inches d. b. h. and over. 



Source: Canada Department of Northern Affairs and 

 National Resources (formerly Department of Resources 



and Development), 

 Amended 1954. 



Forestry Branch. Bulletin 106. 



