PROJECTED TIMBER SUPPLIES 1970 LEVEL OF MANAGEMENT 



65 



Table 51. — Timber removals, net growth, mortality, supplies oj roundwood products, and inventories in the 

 North, 1952, 1962, and 1970, with projections (1970 level of management) l to 2020 



[Million cubic feet] 



Item 



1952 



1962 



1970 



Projections 



1980 



1990 



2000 



2020 



SOFTWOODS 



Removals from growing stock : 



Roundwood products 



Logging residues 



Other removals 



Total 



Net growth 



Mortality 



Roundwood supplies : 



From growing stock 



From other sources 2 



Total 



Inventory of growing stock 



HARDWOODS 



Removals from growing stock: 



Roundwood products 



Logging residues 



Other removals 



Total 



Net growth 



Mortality 



Roundwood supplies: 



From growing stock 



From other sources 2 



Total 



Inventory of growing stock 



524 

 67 

 50 



449 

 55 

 50 



506 

 61 

 62 



730 



77 

 49 



869 

 84 

 52 



1,036 

 94 

 53 



641 



554 



629 



856 



1,005 



1, 183 



1,074 

 228 



1,243 

 301 



1,387 

 360 



1,322 

 422 



1, 194 

 455 



1, 134 

 467 



524 

 79 



449 

 64 



506 

 73 



730 

 73 



869 

 73 



1,036 

 73 



603 



513 



579 



803 



942 



1, 109 



27, 777 



34, 020 



39, 114 



45, 869 



49, 579 



50, 851 



1,057 

 195 

 200 



1,069 

 193 

 242 



1,242 

 222 

 342 



2,261 

 306 



188 



2,998 

 375 

 204 



3,678 

 442 

 209 



1,452 



1,505 



1,806 



2,755 



3,577 



4,329 



3,046 

 570 



3,634 

 732 



4, 153 

 897 



4,253 

 1,045 



4, 199 

 1, 123 



4, 130 

 1, 149 



1,057 

 322 



1,069 

 230 



1,242 

 167 



2,261 

 167 



2, 998 

 167 



3,678 

 167 



1,379 



1,299 



1,409 



2, 428 



3, 165 



3,845 



82, 178 



101, 178 



116, 563 



136, 414 



147, 555 



150, 322 



1,040 

 90 

 53 



1, 183 



1, 134 

 465 



1,040 

 73 



1, 113 



50, 893 



3,632 

 394 

 209 



4,235 



4,036 

 1, 127 



3,632 

 167 



3,799 



147, 238 



1 Plus other area and harvesting assumptions specified 

 in this chapter. 



2 Includes roundwood products from rough and rotten 

 trees, limbs, dead trees, and trees on noncommercial and 

 nonforest land. 



products (table 53). Some 10 percent of the soft- 

 wood removals and 12 percent of the hardwood 

 removals were left in the woods as logging resi- 

 dues — about the same proportion of economically- 

 unusable material as in earlier years. Other 

 removals, including timber losses to urban and 

 industrial development, strip mining, highways, 

 etc., are estimated to have amounted to somewhat 

 more than volumes of logging residues. 



Residues and other removals are expected to 

 decrease over the projection period because of 

 better utilization of available material. Estimated 

 proportions of removals used for products increase, 

 therefore, in future decades to 88 percent of all 



Note: Estimates are for trend levels and consequently 

 may differ from actual figures for the specified years. 



removals for softwoods and 86 percent for 

 hardwoods. 



Under the assumptions of these base projections, 

 prospectively available supplies of softwood round- 

 wood nearly double, from 0.6 billion cubic feet 

 in 1970 to 1.1 billion cubic feet by 2000 (table 51). 

 Projections for hardwoods increase nearly three- 

 fold, from 1.4 billion cubic feet to about 3.8 

 billion cubic feet. Somewhat smaller increases are 

 projected for sawtimber products (table 52). 



Roundwood supplies by owner class. — As in the 

 case of forest areas, farm and miscellaneous private 

 ownerships represent by far the major source of 

 roundwood in the North (tables 54 and 55, and 



