﻿This 
  modification 
  of 
  Row's 
  program 
  does 
  es- 
  

   sentially 
  the 
  same 
  things 
  as 
  the 
  Hall 
  program 
  

   used 
  in 
  the 
  problem 
  illustration. 
  It 
  is 
  more 
  

   complex, 
  however, 
  and 
  accepts 
  a 
  more 
  sophis- 
  

   ticated 
  input 
  in 
  that 
  it 
  requires 
  fewer 
  com- 
  

   puted 
  values. 
  

  

  For 
  example, 
  the 
  estimated 
  intermediate 
  

   and 
  final 
  harvest 
  values 
  need 
  not 
  be 
  computed. 
  

   Instead, 
  the 
  analyst 
  specifies 
  the 
  product(s), 
  

   the 
  expected 
  volume 
  of 
  each 
  product, 
  the 
  

   quality 
  of 
  each 
  product, 
  and 
  a 
  set 
  of 
  product 
  

   prices. 
  The 
  assigned 
  prices 
  are 
  automatically 
  

   adjusted 
  by 
  the 
  quality 
  index 
  specified 
  and 
  

   the 
  yield 
  values 
  are 
  computed 
  as 
  part 
  of 
  the 
  

   program. 
  

  

  Another 
  requirement 
  of 
  the 
  program 
  is 
  

  

  that 
  the 
  analyst 
  specifies 
  the 
  minimum 
  and 
  

   maximum 
  interest 
  rates 
  to 
  be 
  considered 
  and 
  

   the 
  interest 
  rate 
  increment 
  to 
  be 
  used 
  in 
  

   searching 
  for 
  the 
  internal 
  rate 
  of 
  return 
  to 
  

   be 
  earned 
  by 
  each 
  alternative. 
  

  

  The 
  program 
  accepts 
  three 
  different 
  types 
  

   of 
  alternatives 
  (rotation 
  length, 
  site 
  index, 
  

   production 
  system, 
  etc.) 
  and 
  compares 
  three 
  

   alternatives 
  (three 
  stands, 
  three 
  thinning 
  

   jobs, 
  etc.) 
  simultaneously. 
  The 
  program 
  also 
  

   computes 
  the 
  present 
  net 
  worth 
  for 
  the 
  range 
  

   of 
  interest 
  rates 
  specified. 
  

  

  The 
  input 
  and 
  output 
  of 
  the 
  problem 
  illus- 
  

   trated 
  in 
  the 
  text 
  are 
  shown 
  here 
  (figs. 
  10, 
  

   ID. 
  

  

  38 
  

  

  