6,000 board feet per acre; partly cut old-growth 

 stands, over 3,000; second-growth sawlog-size un- 

 cut and partly cut stands, more than 2,000. Only 

 7 percent of the total board-foot volume (Interna- 

 tional %-inch rule) occurred in under sawlog-size, 

 reproduction, and clear-cut stands, all of which had 

 less than 600 board feet per acre. 



More than 50 percent of the volume of saw timber 

 measured by the Doyle rule was in pine, nearly 30 

 percent in hardwoods, and the rest in cypress (table 

 12). Slash pine accounted for 46 percent of the 

 pine volume. Black gum was the most important 

 hardwood from the standpoint of volume, account- 

 ing for 24 percent. Of the volume in longleaf and 

 slash pine, approximately 50 percent was in trees 

 that had been or were being turpentined. 



The pine in old-growth stands makes up almost 

 47 percent of the pine saw-timber volume. 

 Although some of this pine volume is in other than 

 pine types, the proportion given contrasts signi- 

 ficantly with the 13 percent of the pine types that 

 is in old-growth stands. This is due mainly to 

 the prevalence in this class of relatively large trees 

 and heavy stands (table 13). More than 85 per- 

 cent of the volume of hardwood and some 80 per- 

 cent of the cypress is still in stands of old growth. 

 Red oaks have the largest volume in the uncut 

 old-growth stands and black gum in the partly 

 cut. Almost half of the hardwood volume in the 

 uncut old-growth and over a third in the partly 

 cut stands are in trees 21 inches and over in diam- 



eter. The largest individual species volume in 

 the old growth is in cypress, of which practically 

 20 percent is in trees 29 inches and larger in diam- 

 eter. Only 2 percent of the total pine volume 

 (Doyle rule) is in trees 29 inches and larger in 

 diameter. 



Cordwood Volumes 



There is a considerable additional volume in 

 standing timber of such small size or poor quality 

 that it must go, if utilized now, into such products 

 as pulpwood, fuel wood, and fence posts. This 

 volume is expressed in terms of standard cords 

 (4 by 4 by 8 feet), which are measured and sold 

 with the bark included. 



In addition to the cordwood volume in sound 

 and rotten culls and in the tops and limbs of sawlog- 

 size trees, all good trees below saw-timber size, but 

 at least 5 inches in diameter, are included (table 

 14). It does not follow that this latter material is 

 available or should be cut for cordwood; on the 

 contrary, a very considerable part of this class of 

 trees must be held on the land as a source of con- 

 tinuing supply for lumber, poles, ties, and similar 

 wood products. There is an ample supply of cord- 

 wood material available for fuel and farm use in 

 cull trees and in the tops and turpentined butts of 

 sawlog-size trees. A discussion of the growing stock 

 from the standpoint of pulpwood supply is given in 

 the section on "Pulpwood Resources." 



Table 14. — Net cordwood volume of material unsuited for sawlogs by species groups and quality classes 1 



Species group 



Good trees 

 under saw- 

 log-size 



Tops and 

 limbs of saw- 

 log trees ! 



Sound culls 3 



Rotten 

 culls 3 



All quality classes 



Pines: 



Round _ 



Turpentined__ _ _______ 



Nonturpentine ._ __ __ _____ _ _ _ 



Cords 

 6, 891, 900 

 2, 233, 200 

 922, 800 



Cords 

 1, 193, 500 

 * 2, 032, 900 

 616, 100 



Cords 

 43, 400 

 37, 400 



115,900 



Cords 

 5, 200 

 5, 500 

 16, 300 



Cords 

 8, 134, 000 

 4, 309, 000 

 1,671, 100 



Percent 

 21.7 

 11.5 

 4.4 



Total 



10, 047„ 900 



3, 842, 500 



196, 700 



27, 000 



14, 114, 100 



37.6 







Hardwoods: 



Pulping _ 



5, 450, 000 

 5 2, 589, 900 



2, 223, 500 

 1, 339, 900 



1, 426, 600 

 4, 031, 100 



670, 900 

 857, 300 



9, 771, 000 

 8, 818, 200 



25. 1 



Nonpulping _ _ _ 



23.5 







Total 



8. 039, 900 



3, 563, 400 



5, 457. 700 



1, 528, 200 



18, 589, 200 



49.6 







Cypress.. . _ _ 



2, 689, 000 



1, 581, 800 



265, 500 



249. 300 



4, 785, 600 



12.8 









f 20, 776, 800 



1 Percent 

 \ 55.4 



8, 987, 700 



Percent 

 24.0 



5, 919, 900 



Percent 



15.8 



1, 804, 500 



Percent 



4.8 



37, 488, 900 





Total 







100.0 









1 Cordwood volume computed from cubic-foot volume including bark. 



2 Includes cordwood volume in top stems of pines to a 4-inch minimum top and in tops and limbs of hardwoods and cypress. 



3 Includes cordwood volume in top stems of pine culls and in tops and limbs of hardwood and cypress culls; sound culls also include all sound scrub- 

 oak volume. 



4 Includes approximately 580,700 cords in turpentined butts. 



5 Includes all sound special-use species to approximately a 4-inch top. 



28 



