SHORTLEAF PINE : IMPORTANCE AND MANAGEMENT. 



49 



shortleaf pine to be 70 years old, 69 feet high, and to contain 170 

 feet of saw timber, scaled by the Scribner rule. If left 30 years for a 

 second cut, the 14-inch tree will be 100 years old, 16.5 inches in di- 

 ameter, 74 feet high, and scale 270 feet by the Scribner rule. 



An area of 18 acres on a typical cut-over tract on the Arkansas 

 National Forest cut to a 14-inch diameter limit contained an average 

 of 21.4 shortleaf pines per acre, of which 12.4 were 10 inches and 

 over, breast-high diameter, and yielded 1,497 board feet per acre. 

 The actual cut of pine on the sale area of 800 acres averaged 2,434 

 board feet per acre, or almost exactly 62.5 per cent of original stand 

 of 4,000 feet. Table 27 shows the size and number of trees left on a 

 sample 18 acres of this sale: 



Table 27. — Shortleaf pine left on 18 acres of typical cut-over tract on the Ar- 

 kansas National Forest. 1 



Diameter 

 (breast- 

 high) 

 in 1910. 



Trees. 



Diameter 

 (breast- 

 high) 

 in 1940.2 



Sample tract.' 



Total. 



Average 

 number 

 per acre. 



1 



2 



3 



Inches. 



5 



6 



7 



8 



9 



10 



11 



12 



13......... 



14 



15 



16 



17 



1 

 2 

 2 

 3 



14 

 4 

 24 

 16 

 12 

 5 

 3 

 3 



4 

 9 

 14 

 14 

 12 

 14 

 5 

 3 

 2 

 3 

 3 

 1 



8 

 10 

 20 

 27 

 35 

 24 

 26 

 25 

 13 

 13 

 5 

 3 



1 



9 



16 



31 



44 



63 



40 



64 



46 



28 



20 



11 



9 



1 



1 



0.5 



.9 



1.7 



2.4 



3.5 



2.2 



3.6 



2.6 



1.6 



1.1 



.6 



.5 



.1 



.1 



Inches. 

 11.0 

 12.0 

 12.3 

 12.8 

 13.4 

 14.0 

 14.6 

 15.2 

 16.0 

 16.6 

 17.3 

 17.8 

 18.5 

 19.2 



18 





Total. 







89 



84 



210 



383 



21.4 







DIAMETER AND YIELD IN ABOVE STAND. 



Diameter 

 groups. 



Trees. 



Yield. 



Diameter 



groups 



breast-) 



high) 



in 1940. 



Total (18 

 acres). 



Average 

 per acre. 



Total (18 

 acres). 



Average 

 per acre. 



Inches. 

 4 to 9 



14 and above. 



Total... 



161 



178 

 44 



9.0 

 10.0 

 2.4 



Bd.ft. 



Bd.ft. 



Inches. 

 11 to 13. 5 

 14 to 16 

 16. 5 up. 



20,980 

 5,960 



1, 166 

 331 



383 



21.4 



20,940 



1,497 







1 Plots selected and measured by II. I). liurrall, January, Kill, in mixed shortleaf and hardwood stand. 

 Thrr*- sample plots of <; acres each. Stand oat to 1 1-inoh diameter limit. 



2 Ba ed on diameter and growth tables in U. 8. Department of Agriculture Bulletin 244, "Lifo History 



offfliortleaXPiiw." 



If a second cut is made in 30 years, the trees now 10 to 14 inches 

 will have reached diameters of 14 and 16.5 inches, respectively. On 



