SHORTLEAF PINE IN VIRGINIA 



35 



leaving- only the longest-bodied and clearest stemmed trees at 

 each cutting and in which the trees have been forced to large 

 diameters by isolation after the clear stem-length is 50 feet in 

 length, it is believed that the stumpage value can be forced to a 

 value of $8 a 1,000 feet under a logging cost of $12 when 50 

 years old. This would yield about $250 per acre. 



WASTE IN CUTTING SMALL TREES 



The following table shows the actual volume in board feet of 

 trees of different diameters and heights when cut with a saw taking 

 a kerf of one-fourth inch; the volume in board feet when scaled 

 by Doyle-Scribner log rule ; the volume of stem, wood only, in cubic 

 feet; the number of board feet, Doyle-Scribner rule, per cubic foot 

 of volume; and the percentage of waste. 



TABLE 18.. 



Volume in board feet and in cubic feet and per cent of waste in sawing 

 trees of shortleaf pine of different diameters. 



The loss in scaling by Doyle- Scriber rule exceeds seventy-five 

 per cent, of the total cubic volume of the stem until the tree reaches 

 a diameter of thirteen inches, breasthigh. This large proportion 

 of waste is an excellent reason for not cutting young stands for 

 saw timber or for not cutting the small trees in old stands unless 

 they are suppressed trees. 



LUMBERING AND RESTOCKING 



Simultaneously with lumbering comes the subject of securing 

 ri second stand of young pine to replace the one which is cut. 



