cordwood. The 44 million cords in sawlog-size 

 material, which is usually far more valuable for 

 lumber, and the 36 million cords in sound trees 

 under sawlog size, which forms the nucleus of the 

 future saw-timber growing stock, should be cut 

 with restraint to safeguard future supplies. The 

 9 million cords in tops and limbs of sawlog-size 

 pines will become available as the trees are cut, 

 together with the 7 million cords of similar material 

 in hardwoods and cypress not used extensively 

 thus far. The remaining 11 million cords, or 



Figure 26. — Cordwood volume of sound trees by species groups, 

 diameter classes, and sources of material. 



more than 10 percent, in cull trees scattered 

 throughout the region should be salvaged where 

 possible. 



Of the 107 million cords shown in table 14, 

 divided chiefly between pines and hardwoods, 

 approximately 31 percent, excluding cull trees and 

 tops and limbs of sawlog-size hardwoods and cypress, 

 is in the old-growth condition, and 68 percent is in 

 second growth. The negligible remainder is in the 

 clear-cut areas. 



Figure 26 shows diagrammatically the cordwood 

 volume of sound trees by species groups and diam- 

 eter classes. Approximately two-thirds of the pine 

 and cypress volume and half of the hardwood 

 volume is in trees less than 13.0 inches d. b. h. 



Cubic- Foot Volumes 



The cubic-foot volume, which is measured inside 

 bark, includes sound wood only. Although this 

 form of measurement is not used in commercial 

 practice at the present time, it is presented here 

 as a means of expressing the total wood content of 

 the forest stand in terms of a single unit. Of a 



total of approximately 7U million cubic feet of 

 sound material, 54 percent is pine (table 15). Of 

 the cubic-foot volume 58 percent is in sawlog-size 

 trees, about a third in under-sawlog-size trees, and 

 10 percent in culls. About 54 percent of the pine 

 volume is in sawlog material, but only 28 percent 

 of the hardwood volume. The cubic-foot growing 

 stock used as a basis for computing increment 

 excludes the upper stems and limbs of sawlog-size 

 hardwoods, cypress, and cull trees. 



Poles and Piles 



A special inventory was made of trees suitable 

 for poles (based upon the specifications of the 

 American Standards Association) and piles. Be- 

 cause of the difficulty of judging standing trees for 

 this purpose, there was a marked tendency on the 

 part of timber cruisers to apply the specifications 

 rather strictly, and consequently it is believed that 

 the estimate of the number of qualified trees is 

 conservative. Although cypress with sufficient 

 heartwood content is also used for poles and piles, 

 no effort was made to estimate the number of suit- 

 able trees because of the uncertainty of the amount 

 of heartwood. In the following estimates, there- 

 fore, only longleaf, slash, and loblolly pines are 

 included. 



To meet pole and pile requirements, trees must 

 have a uniform taper and be free from decay, bird 

 and insect holes, and injurious scars. They must 

 also be free from large knots or those so located as 

 to impair the strength of the pole, and from short 

 crooks, excessive twist, and spiral grain. They may 

 have a one-way sweep, provided a straight line 

 drawn from the center of the top to the center of 

 the butt does not fall outside the body of the pole 

 at any point. 



Pole and pile trees are scattered singly and in 

 groups throughout the pine stands of the area. As 

 shown by table 16, approximately 36 million trees 

 were estimated to be suitable for poles or piles, of 

 which half were in the 20-foot class, 35 percent in 

 the 25-foot and 30-foot classes, and less than 15 

 percent were at least 35 feet long. 



Approximately 38 percent of the trees with pole 

 or pile qualifications are round slash and longleaf, 

 54 percent are longleaf and slash pine trees being 

 worked for naval stores, and 8 percent are non- 

 turpentine pine. No attempt is made, however, to 

 show what part of this resource is actually available 



39 



