as a whole is shown in figure 34, and for the three 

 survey units in table 33 (Appendix). 



Over half the cordwood volume in the State is in 

 trees of less than 13 inches diameter; the 6- to 8-inch 

 group alone accounts for nearly a quarter of the 

 total. The diameter distribution by species groups 

 is rather uniform for the State, but the physiographic 

 regions show considerable variation. For example, 

 over 70 percent of the pine volume on the piedmont 

 is in trees less than 13 inches in diameter, compared 

 with less than 50 percent on the Coastal Plain. Con- 

 versely, the proportion of the volume of pine trees of 

 large diameter is much smaller on the piedmont 

 than on the Coastal Plain because the piedmont 

 forest is more accessible and the utilization more in- 

 tensive. 



The large volume in sound trees, both pine and 

 hardwood, in the smaller diameter classes, promises 

 a continued supply of saw timber for South Carolina, 

 provided fires are controlled and excessive cutting 

 for fuel wood, pulpwood, and small sawlogs does 

 not prematurely deplete these young stands. 



Cubic-foot Volume 



The cubic foot, although seldom used commer- 

 cially, is a more accurate measure than the board foot 

 or cord, and therefore is the best method of com- 

 puting forest growth and drain and comparing the 

 timber volume of one region with another. Table 15 



SPECIES GROUP 



AND 

 DIAMETER CLASS 



(INCHES) 



VOLUME 



PINES 



6 TO 8 



10 TO 12 



14 TO 18 



20 AND OVER 

 HARDWOODS 

 6 TO 8 



10 TO 12 



14 TO 18 



20 AND OVER 





^^ 



^ 



_ 











s 



SI 





ESS 



S 



iM 



s 



■ 





■■■■ 



n 









1 





^^^ 







^^ 





^^^^^^^^^^^^r^^S^ 







^^^^^^^^^g^:;:^ 



^^^^^'^'^l^^^l 1 



10 20 JO 

 PERCENT 



Figure 34. — 'Distribution of cordwood volume^ by species groups 

 and diameter class. 



Table 15. — Net cubic volume {inside bark) of living trees 5 inches d. b. h. and larger, by class of material, 1936 



Survey unit and species group 



Sawlogs 



Tops of 

 saw-timber 



Under- 



sawlog-size 



trees 



Cull trees 



Total 



State: 

 Pines 



Thousand 

 cubic feet 

 3.108.300 

 1,748,400 

 2SS,640 



Thousand 



cubic feet 



636,810 



843.200 



63,480 



Thousand 

 cMcfeet 

 1.081.200 

 1,734,790 

 60,810 



Thousand 

 cubic feet 



116,380 



1,055,890 



36,880 



Thousand 

 cubic feet 

 4.942.690 

 5,382.280 

 416,810 



Percent 

 46 



Hardwoods 



50.1 





3.9 







All species 



5,112,340 



1.543,490 



2.876,800 



1,209,150 



10.741,780 



100.0 







Southern Coastal Plain: 

 Pines 



991,170 

 536,410 

 92.520 



198,380 

 262.350 

 26.930 



282,440 

 589,660 

 32,480 



10,990 

 246,630 

 12,680 



1,482.980 



1,635,050 



164.610 



45.2 



Hardwoods 



49.8 



Cypress ■._•_ 



5.0 







All species 



1.620.100 



487,660 



904,580 



270,300 



3.282.640 



100.0 







Northern Coastal Plain: 



1.380.540 

 919.650 

 163.120 



270,710 

 443,550 

 36,550 



328,170 

 776,140 

 28,330 



42.080 

 592.500 

 24.200 



2.021,500 



2.731,840 



252,200 



40.4 



Hardwoods 



54 6 



Cypress 



5.0 







All species 



2.463.310 



750,810 



1,132,640 



658.780 



5,005,540 



100.0 



Piedmont: 



Pines- 



736.590 

 292,340 



167,720 

 137,300 



470,590 

 368,990 



63.310 

 216.760 



1,438,210 

 1,015,390 



58.6 



Hardwoods 



41.4 





1.028.930 



305,020 



839,580 



280,070 



2,453,600 



100.0 







Summary by units: 



Percent 

 49.3 

 49.2 

 ■42.0 



Percent 

 14.9 

 15.0 

 12.4 



Percent 

 27.6 

 22.6 

 34.2 



Percent 

 8.2 

 13.2 

 11.4 



Percent 

 100.0 

 100.0 

 100.0 





Northern Coastal Plain 













State average [ 



47.6 i 14.4 



26. S 



11.2 



100.0 





36 



