SHORTLEAF PINE IK V1K(J1M.\ 



a medium, and a high cost of operation, and are made up of the 

 cost of logging, felling, sawing, grading, interest on the investment 

 and carrying charges, cost of selling, delivery at market and load- 

 ing, drying, and profit of the operator. A profit of from $2 to $3 

 a thousand feet should be allowed in portable mill operations, 

 the profit varying according to the size and length of the oper- 

 ation. It is noteworthy that while the value of the lumber per 

 1,000 board feet which is yielded by trees of different diameters 

 increases rapidly up to 16 inches in diameter, there is a decline 

 in the value per 1,000 feet of the lumber which is sawed from 

 trees of diameter above 17 inches. This is due to the fact that the 

 largest trees in these stands have larger and more numerous knots 

 in their stems and yield a lower proportion of the high grades 

 of lumber than do the slender, more clean stemmed, intermediate, 

 and suppressed trees. 



If the number of trees, of each diameter per acre in a 45- 

 year old stand (see Table 2) be multiplied by the value per tree 

 of each respective diameter, the sum of these amounts will give 

 the total value of the stand per acre, and from this the value per 

 1,000 feet of the stand. A similar set of values can be determined 

 for trees in younger and older stands. These are given in Table IT. 



TABLE 17. 



Value per 1,000 board feet of the lumber which can be sawed from dense unthinned stands 

 of short-leaf pine under different costs of manufacture and delivery. 



If the values in Table IT are compared with the cos.t per 

 1,000 board feet of growing timber, shown in Table 10, it will 

 be seen that the investment, if the stand is unthinned, does not 

 yield five per cent, net, except under a logging cost of $10 and 

 when the stand is cut at the age of 50 years. 



In a regularly thinned stand from which the very knotty trees 

 have been systematically removed when the stand was young. 



