﻿42 
  WORKING 
  PLAN 
  FOR 
  FOREST 
  LANDS 
  NEAR 
  PINE 
  BLUFF, 
  ARK. 
  

  

  EFFECT 
  OF 
  FIRE 
  PROTECTION 
  UPON 
  FUTURE 
  YIELDS. 
  

  

  An 
  important 
  conclusion 
  follows. 
  The 
  tires 
  which 
  have 
  repeatedly 
  

   swept 
  the 
  tract 
  have 
  reduced 
  the 
  proportion 
  of 
  pine 
  trees 
  under 
  22 
  

   inches 
  now 
  standing. 
  If 
  the 
  forest 
  were 
  normal 
  — 
  that 
  is, 
  if 
  all 
  age 
  

   classes 
  were 
  present 
  in 
  sufficient 
  amounts 
  to 
  maintain 
  the 
  present 
  stand 
  

   of 
  mature 
  timber 
  in 
  years 
  to 
  come 
  — 
  equal 
  cuts 
  could 
  be 
  obtained 
  in 
  

   much 
  shorter 
  periods 
  than 
  are 
  now 
  necessary, 
  and 
  probably 
  twenty- 
  

   five 
  years 
  would 
  produce 
  a 
  second 
  crop 
  ecpial 
  to 
  the 
  first. 
  In 
  that 
  case 
  

   a 
  total 
  area 
  of 
  170,000 
  acres 
  would 
  suffice 
  for 
  a 
  sustained 
  yield 
  equal 
  

   to 
  the 
  present 
  annual 
  consumption 
  instead 
  of 
  the 
  much 
  larger 
  area 
  now 
  

   required. 
  

  

  SUSTAINED 
  ANNUAL 
  YIELD 
  OF 
  THE 
  FOREST. 
  

  

  The 
  sustained 
  annual 
  yield 
  which 
  can 
  be 
  obtained 
  from 
  the 
  forest 
  is 
  

   given 
  in 
  the 
  following 
  table. 
  It 
  shows 
  the 
  annual 
  merchantable 
  cut 
  

   of 
  pine 
  per 
  acre, 
  the 
  area 
  to 
  be 
  lumbered 
  annually, 
  the 
  total 
  annual 
  

   cut, 
  and 
  the 
  time 
  required 
  for 
  a 
  second 
  cut 
  equal 
  to 
  the 
  first, 
  for 
  the 
  

   diameter 
  limits 
  of 
  12, 
  14, 
  16, 
  18, 
  and 
  20 
  inches. 
  

  

  Table 
  No. 
  13. 
  — 
  Sustained 
  annual 
  yield 
  of 
  merchantable 
  pine 
  in 
  board 
  feet, 
  area 
  to 
  be 
  

   /limbered 
  annually, 
  and 
  time 
  required 
  to 
  rut 
  over 
  tract. 
  

  

  Cutting 
  

   limit, 
  

   diameter 
  

   breasthigh. 
  

  

  Area 
  to 
  be 
  

   lumbered 
  

   annually. 
  

  

  Annual 
  

   cut 
  per 
  

   acre. 
  

  

  Total 
  annual 
  

   cut. 
  

  

  Time 
  re- 
  

   quired 
  to 
  

   cut 
  over 
  

   tract. 
  

  

  Inches. 
  

  

  Acres. 
  

  

  Board 
  feet. 
  

  

  Board 
  feet. 
  

  

  Years. 
  

  

  12 
  

  

  2,380 
  

  

  6,067 
  

  

  14,439,460 
  

  

  42 
  

  

  14 
  

  

  2,439 
  

  

  5,845 
  

  

  14,255,955 
  

  

  41 
  

  

  lti 
  

  

  2,439 
  

  

  5,597 
  

  

  13,651,083 
  

  

  41 
  

  

  18 
  

  

  2,380 
  

  

  5, 
  130 
  

  

  12,209,400 
  

  

  42 
  

  

  20 
  

  

  2,380 
  

  

  4,561 
  

  

  10, 
  855, 
  180 
  

  

  42 
  

  

  SUSTAINED 
  ANNUAL 
  YIELD 
  IN 
  RELATION 
  TO 
  THE 
  PRESENT 
  

   CAPACITY 
  OF 
  THE 
  MILL. 
  

  

  The 
  Sawyer 
  & 
  Austin 
  Lumber 
  Company 
  own 
  and 
  operate 
  a 
  mill 
  with 
  

   an 
  annual 
  capacity 
  of 
  40,000,000 
  board 
  feet. 
  The 
  present 
  tract 
  of 
  

   100,000 
  acres, 
  cutting 
  to 
  a 
  diameter 
  limit 
  of 
  12 
  inches, 
  can 
  supply 
  con- 
  

   tinuously 
  about 
  14,500,000 
  feet 
  per 
  year. 
  The 
  following 
  table 
  shows, 
  

   approximately, 
  the 
  forest 
  area 
  which 
  would 
  be 
  necessary 
  to 
  produce 
  a 
  

   sustained 
  annual 
  yield 
  of 
  40,000,000 
  board 
  feet 
  per 
  year. 
  It 
  estimates 
  

   for 
  the 
  several 
  diameter 
  limits 
  the 
  annual 
  cut 
  per 
  acre, 
  the 
  area 
  to 
  be 
  

   lumbered 
  annually, 
  the 
  time 
  required 
  to 
  cut 
  over 
  the 
  present 
  tract, 
  and 
  

   that 
  required 
  for 
  a 
  second 
  cut 
  equal 
  to 
  the 
  first. 
  

  

  