PROJECTED TIMBER SUPPLIES — 1970 LEVEL OF MANAGEMENT 



47 



Table 33. — Sawtimber removals, net growth, mortality, supplies of roundwood products, and inventories 

 in the United States, 1952, 1962, and 1970, with projections (1970 level oj management) 1 to 2020 



[Billion board feet] 



Item 



1952 



1962 



1970 



Projections 





1980 



1990 



2000 



2020 



SOFTWOODS 



Removals from sawtimber: 

 Roundwood products 



35.3 

 2.6 

 1. 3 



34 1 

 2. 3 

 1.3 



43. 5 



2.5 

 1. 7 



45. 6 

 2.3 



1.5 



47.6 

 2. 

 1.6 



50.8 

 1.8 

 1.6 



50. 1 



Logging residues 



1. 5 



Other removals. _ . 



1. 6 







Total 



39.2 



37. 7 



47.7 



49.4 



51. 2 



54. 2 



53.2 



Net growth _ _ _ _ _ 



29. 5 

 11.9 



34. 7 

 11.6 



40. 3 

 11. 3 



43. 3 

 10.8 



45. 7 

 10.6 



47. 2 

 10.4 



48. 4 



Mortality. . 



10. 







Roundwood supplies: 



From sawtimber . . . 



From other sources 2 . _ . 



35.3 



3.5 



34. 1 

 3.4 



43.5 

 3.4 



45. 6 

 3.2 



47. 6 

 3.3 



50. 8 

 3.4 



50. 1 

 3.8 



Total ... .. . ... 



38.8 



37. 5 



46. 9 



48. 8 



50.9 



54. 2 



53.9 







Inventory of sawtimber . 



1, 978. 9 



1, 955. 5 



1, 905. 3 



1, 823. 



1, 777. 1 



1, 724. 6 



1, 621. 9 



HARDWOODS 



Removals from sawtimber: 

 Roundwood products 

 Logging residues. . 



11.3 



. 9 

 1. 1 



10.0 

 1. 



1.6 



11.2 



1. 2 



2. 6 



14. 4 

 1. 1 



. 7 



17. 1 

 1.0 



.8 



19.5 

 1.0 



.8 



19. 4 

 . 8 



Other removals .__ _ . 



. 7 







Total ... ... 



13.3 



12.6 



15.0 



16. 2 



18. 9 



21.3 



20.9 



Net growth. . 



15. 6 

 3. 1 



17.6 

 3. 6 



19. 7 

 4.0 



20 8 

 4. 3 



21. 

 4.6 



20. 9 

 4.7 



20. 3 



Mortality _ 



4. 7 







Roundwood supplies: 



From sawtimber ... 



11. 3 



.8 



10.0 



. 8 



11. 2 



1. 1 



14. 4 

 1. 1 



17. 1 

 1. 1 



19. 5 

 1. 1 



19. 4 



From other sources 2 



1. 1 



Total 



12. 1 



10. 8 



12. 3 



15. 5 



18. 2 



20. 6 



20.5 



Inventory of sawtimber. _ __ 



433. 1 



474.8 



515.5 



572.8 



608.3 



618. 8 



611. 6 







1 Plus other area and harvesting assumptions specified 

 in this chapter. 



2 Includes roundwood products from rough and rotten 

 trees, dead trees, trees on noncommercial or nonforest 



1980-2020, are presented in table 32 in cubic feet, 

 and in table 33 in board feet. 5 These base pro- 

 jections reflect management levels of 1970 and 

 related area and cutting assumptions specified 

 earlier. 



The estimates of removals, net growth, and 

 inventories developed in this study refer to 



5 As indicated in table footnotes in Chapter I, data 

 shown for 1952 and 1962 may differ from figures in previous 

 publications because of revisions to insure comparability 

 with 1970 definitions and specifications, or because of 

 adjustments based on new information from Forest Survey 

 plots. Figures also are "trend level" estimates and may 

 differ from actual figures for the specified years. 



land, and from trees of less than sawtimber size used as 

 saw logs. 



Note: Estimates are for trend levels and consequently 

 may differ from actual figures for the specified years. 



growing-stock trees, including sawtimber trees, on 

 commercial timber] and, excluding rough and 

 rotten trees, salvable dead trees, and trees on 

 other types of land. Estimates of roundwood sup- 

 plies available to forest industries, on the other 

 hand, include material from both growing stock 

 and these other sources. 



Trends in Timber Removals 



Annual removals of softwood growing stock 

 increased about 23 percent between 1952 and 1970 

 to a total of 9.6 billion cubic feet (table 32 and fig. 

 20). Projections of available softwood removals 



