LOBLOLLY OB NORTH CAROLINA PINE. 



65 



TABLE 17. DIAMETER BMUCTHIOI OUTWDB TBB BAKK or LOBLOLLY PIKB AND THE COUUMPOMD- 



tXQ Brmtr DIAMETER INBIDB T BAM. 



Column 4, Table .18, shows the diameter growth of a pure stand in an 

 old field on soil quite similar to that on which the group in column 3 

 was growing, except that the soil was previously cultivated. The culmi- 

 nation in diametep took place at the end of the first decade, with a 

 growth for the decade of nearly 8 inches; but the subsequent decrease 

 in growth is so rapid, that between the fifth and sixth decades it is only 

 .4 of an inch. This manner of growth is characteristic of the dry old 

 fields. The rate of diameter growth of .trees on longleaf and pocoson 

 pine flat lands (column 3), like the height growth of these species on 

 the same site, is slow but persistent. As the trees stand \\vll apart, the 

 crowns are well developed and the diameter growth is at a maximum for 

 this condition. 



