N. C. GEOLOGICAL AND ECONOMIC SURVEY. 



PLATE IX. 



Type of wood from lower part of stem in old-field stand. The coarse-grained center indicates larse 

 knots. This tree became codominant or intermediate when about three inches on the radius. The 

 diameter growth was slow on account of the crowding and the stem cleaned of branches. It was 

 isolated by thinning when three and one-half inches on the radius. The stem at that time resembled 

 that of one of the isolated trees shown on Plate XVI. As a result^ of this thinning the growth during 

 the past ten years has been at the rate of one inch in diameter every three years. While the wood 

 formed since thinning is coarse grained, it is clear and free from knots. The large amount of hard 

 summerwood is characteristic for flatwoods soils. (Author's illustration.) 



Characteristic wood from lower logs of trees in mixed stand.', medium fine and even gra'ned. The crown 

 of this tree overtopped the hardwoods when it was about sixty years old (at 3.3 inches on the radius). 

 Since this period the diameter growth has been at the rate of one inch every four years (seven and 

 one-half rings to the inch of radius). This stem is practically free of knots for sLsty feet and the 

 wood is of high quality. Nearly the same result can be obtained by the method of cutting which is 

 recommended for the best sites which seeks to develop the codominant and intermediate trees to form 

 the mature stand, and by gradual cutting eventually to develop the best of the suppressed trees. 

 Author's illustration.) 



TYPES OF LOBLOLLY PINE WOOD. 



