LOBLOLLY OR NORTH CAROLINA PINE. 



87 



TABLE 34. VOLUME or TREES OF LOBLOLLY PINE OF DIFFERENT DIAMETERS AND HEIGHTS, QUAL- 

 ITY II, AGE 35 TO 45, IN CUBIC FEET, AND IN CORDS, WITH AND WITHOUT BARK; NUMBER OF 

 TREES TO A CORD, AND PROPORTION OF BARK, WITHOUT STUMP OR TOP BBLOW 3 INCHES. (FOR 

 RANGE OF HEIGHTS SEE TABLE 13.) 



The per cent of solid wood to a cubic foot of piled cordwood varies 

 with the diameter of the tree when the wood is cut in 4 or 5 foot lengths. 

 With trees below 7 inches in diameter it is 63 per cent; trees 7 to 9 

 inches, it is 69 per cent ; trees 10 inches and over, if the larger pieces are 

 split, is is 72 per cent. By combining this with columns 8 and 9, Table 

 23, a factor is obtained showing the number of board feet per long cord 

 of bolts. This gives a yield of 616 board feet from a cord of peeled 

 wood from 7-inch trees cut in 4-foot bolts ; and about 750 board feet per 

 cord of wood from trees 10 inches in diameter. When wood is in pieces 

 longer than 5 feet the per cent of solid wood is somewhat less than is 

 given and the number of board feet per cord somewhat smaller. 



YIELD OF PURE EVEN-AGED STANDS. 



Loblolly pine characteristically forms over large areas pure stands 

 which are to a great extent even-aged. While it also grows in mixed 

 stands and pure uneven-aged stands, its occurrence in pure even-aged 

 stands is of chief importance on account of their large yield, the ease 

 with which they are logged, and the simplicity of their management. 



On the basis of 90 plots laid off in stands of different ages and under 

 different conditions of growth yield tables were constructed for even-aged 

 stands of loblolly pine. The plots were fully stocked with normally de- 

 veloped crowns and stems. Yield tables have a two-fold value. They 

 show the approximate yield per acre which can be expected at any given 

 age when the quality site is known or can be determined. They also show 

 the time at which a stand produces the largest amount of wood, and by 

 determining its quality or grade yield, the time when it has the greatest 

 value. 



