140 



LOBLOLLY OR XOETH CAROLINA TIXE. 



Pure Even-aged Stands for Cordwood. 



Cordwood either with or without bark is chiefly used for fuel, pulp- 

 wood, crate, stave and heading stock. There is little, if any, increase 

 in price with increase in size, if small trees less than 6 inches in diam- 

 eter breasthigh are excluded. In fixing, therefore, the most profitable 

 age for cutting cordwood only the volume of the stands and the cost of 

 producing it need be considered. Table 72 gives the age at which cord- 

 wood is most cheaply produced, assuming the value of the land at $5 

 an acre and an interest rate of six per cent with no expense for re- 

 stocking or protection. The cheapest cost of production on all quality 

 sites is when the stand is between 25 and 30 years old. The yields at 

 this age are given in Table 37. If cutting is done to a larger diameter 

 in the top or if knotty tops are excluded, as shown in discussing this 

 table, a deduction must be made from the volume given in Table 37 and 

 a corresponding increase made in the cost of growing. 



Table 72. — Cost of Growing Cordwood in Fullt Stocked Stands of Loblolly Pine at Dif- 

 ferent Ages on Different Quality Sites on Land Valued at $5 an Acre and Interest at 

 Six Per Cent. 



Stem Wood Only from Trees Six Inches and Over in Diameter. 



If reasonably clear wood only is used the yields of the stands would 

 be reduced about 15 per cent and there would be an increase of about 

 15 per cent in the cost of growing the wood. 



