SHORTLEAF PINE IN VIRGINIA 



TABLE 8. 



Cost per cord of growing shortleaf pine cordwood, stemwood with bark, in 

 unthinned and thinned stands; including thinnings, land value $5.00 an 

 acre, interest rate five per cent, and one per cent yearly in addition 

 for taxes and protection. 



* Column 2 i< obtained by calculating the Interest at 5 per cent, plus l per cent, for taxes, 

 making a total of 6 per cent., compounded annually on a land value of $5 per acre. 

 Since tue land will remain after the timber is sold, its value is not included in the cost 

 oi growing. 



t Column 4 is obtained by dividing column 2 by column 3. 



j Column 7 is the product of columns 5 and 6 compounded at 5 per cent every 5-year 

 period. Tha value of wood removed in thinnings (column 6) is only nominal on ac- 

 count of its small size and the difficulty of making thlnnings- 



Column 8 is the remainder after deducting column 7 from column 2. 



$ Column 10 is obtained from dividing column 8 by column 9. 



Cost of Growing Cordwood. Table 8 shows the cost of 

 growing cordwood in both thinned and unthinned stands at a five 

 per cent, interest rate. 



PRODUCTION OF SAW TIMBER 



Influence of Density of Stand Upon Yield of Saw Timber at 



Different Ages. 



Maximum yield in lumber is obtained neither from stands 

 which are continuously very crowded nor from understocked stands, 

 but from stands which are periodically and lightly thinned after 

 having been crowded. 



The most marked effect of thinnings in crowded stands is 111 

 the amount and quality of the yield in board feet. The stands 

 which were measured to determine the effects of thinnings had 

 been thinned in no definite manner; in some cases only the smaller 

 trees, in other cases also some of the larger ones, had been cut out. 



