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  WORKING 
  PLAN 
  FOR 
  FOREST 
  LANDS 
  NEAR 
  PINE 
  BLUFF, 
  ARK. 
  

  

  the 
  first 
  one 
  hundred 
  years 
  the 
  yearly 
  average 
  growth 
  in 
  height 
  is 
  

   0.S3 
  foot, 
  and 
  for 
  the 
  first 
  twenty 
  years 
  1.5 
  feet. 
  (See 
  tig. 
  8.) 
  

  

  Relation 
  of 
  aye 
  to 
  merchantable 
  contents. 
  — 
  The 
  curve 
  here 
  given 
  

  

  20 
  40 
  60 
  80 
  100 
  120 
  140 
  160 
  180 
  200 
  220 
  240 
  

  

  AGE 
  — 
  YEARS 
  

  

  Fig. 
  5. 
  — 
  Diagram 
  showing 
  the 
  diameter 
  growth 
  of 
  Shortleaf 
  and 
  Loblolly 
  Pine 
  on 
  the 
  basis 
  of 
  age. 
  

  

  shows 
  the 
  volume 
  growth 
  in 
  hoard 
  feet 
  for 
  Shortleaf 
  and 
  Loblolly 
  

   Pine, 
  the 
  contents 
  being 
  calculated 
  according 
  to 
  Doyle's 
  Rule. 
  

  

  Between 
  80 
  and 
  140 
  years 
  of 
  age 
  the 
  Shortleaf 
  Pine 
  increases 
  very 
  

   uniformly 
  in 
  merchantable 
  contents, 
  after 
  which 
  age 
  the 
  rate 
  of 
  

  

  