VOLUME PER 

 ACRE CLASS 



(BOARD FEET) 



AREA 



VOLUME 



LESS THAN 2,000 

 2,000-5,999 

 6,000 - 9,999 

 10,000 AND OVER 



LESS THAN 2,000 

 2,000-5,999 

 6,000-9,999 



10,000 AND OVER 



LESS THAN 2,000 

 2,000 - 5,999 

 6,000-9,999 



10,000 AND OVER 



SOUTHERN COASTAL PLAIN 



Figure 



32. — Saw-timber area and volume, by survey units and density classes, 1936. 



Only 10.5 percent of the State's timber area bears 

 10 M board feet or more per acre, but it contains 33 

 percent of the sawlog-size volume. Stands of 10 M 

 board feet and up per acre are rare in the piedmont 

 but more common on the Coastal Plain. 



From the above figures we can see that, as might 

 be expected, stands with 6 M board feet and more 

 per acre contain over half of South Carolina's saw- 

 timber volume, but occupy only a quarter of the saw- 

 timber area. The larger proportion is found on the 

 Coastal Plain; the piedmont has only 33 percent of 

 its volume and less than 13 percent of its area in 

 these denser stands. 



The most important conclusion to be drawn from 

 the data is that, although most of the sawlog-size 

 volume in the State is unquestionably in operable 

 stands, more than a fourth of the saw-timber area 

 bears less than 2 M board feet per acre. 



Cordwood Volume 



Measured in cords, the total volume of trees 5 

 inches d. b. h. and larger, including bark, is 158 mil- 

 lion standard cords. Fifty-three percent is hard- 

 wood. This contrasts with the board-foot volume, 

 which is 61 percent pine, largely because the mini- 

 mum sawlog tree diameter is less for pine than for 

 hardwoods, and the proportion of cull trees (which 

 are included in the cordwood volume) is much higher 

 for hardwoods than for pines (fig. 33). 



Volume by Class of Material 



Table 14 shows the net cordwood volumes of pines, 

 hardwoods, and cypress, by class of material, for the 

 three survey units and the State as a whole. Saw- 

 log material, which furnishes the bulk of current 

 supplies — lumber, veneer, etc. — for the wood-using 

 industries, makes up 62 percent of the cordwood 

 volume for pines, 31 percent for hardwoods, 59 per- 

 cent for cypress, and 45 percent for all species com- 

 bined. About 15 percent of the volume is in tops of 

 sawlog trees. This top wood is being used increas- 

 ingly for pulp and fuel, but is, of course, available 

 only as the sawlog trees are cut. 



SPECIES GROUP AND 

 CLASS OF MATERIAL 



PINES 



SAW-TIM8ER 



UNOER-SAWUOG-S1ZE| 



CULL TREES 

 HARDWOODS 



SAW TIMBER 



UNOERSAWLOG-SIZE 



CULL TREES 



Figure 33. — Cordwood volume by species groups and das 

 of material. 



34 



