FOREST LAND AND TIMBER RESOURCES 



89 



Table 61. — Volume of growing stock and sawtimber on commercial forest land, by section and by softwoods 



and hardwoods, January 1, 1963 



GROWING STOCK 



Section 



All species 



Softwoods 



Hardwoods 





Volume 



Proportion 



Volume 



Proportion 



Volume 



Proportion 



North 



Million cu. ft. 



136,469 



134,086 



98,724 



258,603 



Percent 

 100.0 

 100.0 

 100.0 

 100.0 



Million cu. ft. 



31,306 



62,688 



93,360 



246,728 



Percent 



23 

 47 

 95 

 95 



Million cu. ft. 



105,163 



71,398 



5,364 



11,875 



Percent 



77 



South _. 



53 



Rocky Mountains 



5 



Pacific coast 



5 



Total 



627,882 



100.0 



434,082 



69 



193,800 



31 



SAWTIMBER 



North 



South 



Rocky Mountains 



Million bd. ft. 



309,774 



412,070 



418.392 



1,396,563 



Percent 

 100.0 

 100.0 

 100.0 

 100.0 



Million bd. ft. 



66,627 



224,757 



408,870 



1,357,768 



Percent 

 22 

 55 

 98 

 97 



Million bd. ft. 



243,147 



187,313 



9,522 



38,795 



Percent 



78 



45 



2 



Pacific coast 



3 



Total 



2,536,799 



100.0 



2,058,022 



81 



478,777 



19 



Growing Stock Inventories Up 5 Percent 

 Since 1953; Sawtimber Down 1 Percent 



During the 1953-63 decade growing stock 

 inventories increased roughly 32 billion cubic 

 feet, while sawtimber volumes dropped about 

 24 billion board feet (table 63). 



Table 62. — Proportion of growing stock and 



sawtimber, by sections, January 1, 1963 



GROWING STOCK 



Section 



All 

 species 



Soft- 

 woods 



Hard- 

 woods 



North 



Percent 

 22 

 21 

 16 

 41 



Percent 



7 



14 



22 



57 



Percent 

 54 



South _ 



37 



Rocky Mountains 



3 



Pacific coast 



6 



United States 



100 



100 



100 







SAWTIMBER 



North. _. . 



12 

 16 

 17 

 55 



3 

 11 

 20 

 66 



51 



South .. 



39 



Rocky Mountains 



2 



Pacific coast 



8 



United States. .. 



100 



100 



100 







These estimates of change must be considered 

 as approximations, however, because of sampling 

 errors involved in estimates of timber inventories, 

 growth, and cut, and the necessity of updating 

 or backdating timber inventory data collected 

 over a period of years. These changes were com- 

 puted from the most recent forest surveys up- 

 dated to 1963 and revised estimates for 1953 

 that are substantially higher than those published 

 in "Timber Resources for America's Future." 

 Upward revisions of timber inventory estimates 

 for 1953 were based primarily on new area and 

 volume data from recent surveys in a number of 

 States for which only preliminary estimates were 



© 



Pacific CoosI 



DISTRIBUTION OF SAWTIMBER 



billion board leet 



© 



Norlh 

 310 



Sooltl 



412 



1 1 Softwoods 

 ^^ Hardwoods 



Fisure 39 



744-350 0—65- 



