24 CHESTNUT IN TENNESSEE. 



extract stock, while a relatively small amount is used for fuel. Con- 

 sequently the dimensions for wood used in constructing the cord- 

 wood yield tables conform to the manufacturers' specifications for 

 the tannic acid extract wood. The wood in Tennessee is used with 

 the bark attached. Split-stem wood is most desired, but a small 

 proportion of round wood is taken to a diameter of three inches if 

 straight and free from large knots. This permits the use of much 

 branch wood and the cutting of trees as small as five inches in 

 diameter. Wood with large knots, as from the crowns of old trees, 

 is rejected by the manufacturers. If trees less than 25 inches in 

 diameter are well handled the tops can be completely worked up, 

 except for the crooked parts of the limbs and the portions having 

 a diameter less than 3 inches. 



Table 4 gives the yield in long cords (160 cu. ft.) per acre of 

 chestnut stands at different ages, and of different qualities of 

 growth. In the second column under each quality is given the 

 growth in cords during each decade. The maximum growth in the 

 first quality site takes place during the fifth decade; in the second 

 and third during the sixth decade. 



The first and second quality stands contain about 10 per cent 

 of the species other than chestnut, and the third about 15 per cent, 

 which is not included in the tables. In the first and second qualities 

 the associated species are chiefly yellow poplar, red oak and white 

 pine. In the third it is largely chestnut oak, the wood of which to 

 a limited extent is also used for extract stock. 



Table 4 Yield of long cords per acre in wood and bark of pure 

 stands of chestnut at various ages on different quality sites. Trees 

 taken to a minimum diameter of 5 inches, and split as required in 

 specifications for tannic extract wood. 



