PROJECTED TIMBER SUPPLIES — 1970 LEVEL OF MANAGEMEXT 



55 



Table 40. — Timber removals, net growth, mortality, supplies of roundwood products, and inventories in the 

 South, 1952, 1962, and 1970, with projections (1970 level of management) 1 to 2020 



[Million cubic feet] 



Item 



1952 



1962 



1970 



Projections 





1980 



1990 



2000 



2020 



SOFTWOODS 



Removals from growing stock: 

 Roundwood products 



2,792 

 196 

 124 



2, 444 

 165 

 171 



3,575 

 263 

 158 



4,453 

 260 



71 



5, 049 



231 



76 



5,599 



189 



78 



5, 619 



Logging residues _ . _ . 



111 



Other removals . ... 



78 







Total . - -. .__.__. 



3, 112 



2, 780 



3,996 



4, 784 



5,356 



5,866 



5, 808 







Net growth.. . . _. ..... 



3,587 

 332 



4, 481 

 391 



5,401 

 457 



5,801 

 519 



5,865 

 565 



5,799 

 582 



5, 739 



Mortality ... . . . 



576 







Roundwood supplies: 



From growing stock .... 



2, 792 

 257 



2,444 

 234 



3,575 

 170 



4,453 

 169 



5,049 

 168 



5,599 

 169 



5, 619 



From other sources 2 . . ...... 



169 







Total .... .. 



3, 049 



2,678 



3,745 



4,622 



5,217 



5,768 



5, 788 







Inventory of growing stock. 



55, 115 



66, 787 



78, 405 



90, 453 



98, 018 



100, 325 



99, 396 







HARDWOODS 



Removals from growing stock: 

 Roundwood products 



1,568 

 547 

 448 



1,303 

 421 

 921 



1,437 

 420 

 630 



2,419 



447 



92 



2,778 



456 



95 



3,096 



441 



97 



3, 185 



Logging residues _ .. . .. . ,. , 



290 



Other removals .... ...... 



97 







Total 



2,563 



2,645 



2,487 



2,958 



3,329 



3,634 



3,572 







Net growth. . ... 



2,730 

 621 



2,974 

 700 



3,208 

 714 



3,457 

 759 



3,568 

 791 



3, 561 

 802 



3, 500 



Mortality . . ........ 



788 







Roundwood supplies: 

 From growing stock 



1,568 

 367 



1,303 

 303 



1,437 

 231 



2,419 

 232 



2,778 

 231 



3,096 

 231 



3, 185 



From other sources 2 ... . . 



231 



Total 



1,935 



1,606 



1,668 



2, 651 



3,009 



3,327 



3,416 







Inventory of growing stock . .. 



75, 570 



78, 256 



81, 112 



86, 888 



90, 421 



91, 170 



89, 671 







1 Plus other area and harvesting assumptions specified 

 in this chapter. 



2 Includes roundwood products from rough and rotten 

 trees, dead trees, and trees on noncommercial and non- 



forest land. 



Note: Estimates are for trend levels and consequently 

 may differ from actual figures for the specified years. 



On the other hand, very little change is pro- 

 jected in available removals of hardwood saw- 

 timber, in spite of a sizable projected increase 

 in growing stock removals. This difference reflects 

 the heavy cutting of larger diameters and the 

 concentration of future volumes in smaller size 

 trees. 



Removals by size of material. — About three- 

 fourths of the softwood timber removed in 1970 

 was derived from trees above 9.0 inches in 

 diameter (fig. 26). Trees 5-9 inches in diameter 

 provided the remaining one-fourth of these 

 removals (table 42). 



Material in the saw-log portion of softwood 

 sawtimber trees — of key importance for lumber 

 and plywood production — represented about 66 

 percent of the estimated total removals in 1970. 

 This proportion of saw-log material is estimated 

 to remain roughly the same in the projection 

 period with the cutting rates assumed in this 

 section. 



In the case of hardwoods, removals from the 

 saw-log portion of sawtimber trees in 1970 rep- 

 resented only about half the total removals (fig. 

 27). The principal change in projected removals 

 is a sizable gain in volume and proportion of trees 



