APPENDIX. 



197 



Table 66.— Pine, Loblolly— Yield Per Acre— All Types Com- 

 bined. 



EASTERN TEXAS. 

 [Data gathered by R. Zon for Loblolly Pine Study, 1903-4.] 



Age. 



Total. 



Within each decade. 



Annual average 

 within each decade. 



Years. 

 10 



Cubicft. 

 1,650 

 2,600 

 3,200 

 3,700 

 4,150 

 4,600 

 5,000 



Board ft. a 



Cubicft. 

 1,650 

 950 

 600 

 500 

 450 

 450 

 400 



Boardft.a 



Cubicft. 

 165 

 95 

 60 

 50 

 45 

 45 

 40 



Boardft.a 



20 



6,500 

 7,450 

 9,300 

 11,900 

 14,500 

 17,100 







30 



950 

 1,850 

 2,600 

 2,600 

 2,600 



95 

 185 

 260 

 260 

 260 



40 



50 



60 



70 





a Herring log rule. 

 Table 67. — Pine, Scrub — Yield Per Acre. 



MONTGOMERY COUNTY, MD. 

 [Data gathered by W. D. Sterrett for Scrub Pine Study, 1905.] 



j 



. i Number 

 ^S^' ! of trees. 



Total Fire- ^^^l^ 

 stem. wood. ^^^^^ 



Basis. 



Years. 

 15 



2,510 



! 



Cubicft. Cords. ■■ Cords. 

 1,280 12.8 



39 sample plots 

 J to 1 acre 

 each. 



20 



1,470 



2.010 ! 20.1 



25... 



885 2, 510 25. 1 



625 i 2,990 ! 29.9 26.0 

 490 1 3,450 1 34.5 30.0 

 420 i 3.900 ' .39.0 .33.9 



30 



35 



40 



45... 



380 

 370 



4,290 1 42.9 : 37.3 

 4,650 46.5 40.4 



50 





