32 WORKING PLAN FOR FOREST LANDS NEAR PINE BLUFF, ARK. 



1300 



q" ' uu 20 40 60 80 100 '' 120 140 160 180 2U0 220 240 



AGE — YEARS. 

 Fig. 7.— Diagram showing the merchantable contents in board feet of Shortleaf and Loblolly Pine on 



the basis of age. (Contents by Doyle's Rule. ) 



