﻿Selection 
  of 
  Elementary 
  Species 
  117 
  

  

  one 
  must 
  undertake 
  under 
  his 
  own 
  conditions. 
  

   Some 
  varieties 
  will 
  prove, 
  after 
  isolation, 
  to 
  

   be 
  profitable 
  for 
  large 
  districts 
  and 
  perhaps 
  

   for 
  whole 
  states. 
  Others 
  will 
  be 
  found 
  to 
  be 
  

   of 
  more 
  local 
  value, 
  but 
  in 
  such 
  localities 
  to 
  excel 
  

   all 
  others. 
  

  

  As 
  an 
  example 
  we 
  may 
  take 
  one 
  of 
  the 
  varie- 
  

   ties 
  of 
  wheat 
  originated 
  by 
  the 
  Minnesota 
  Ex- 
  

   periment 
  Station. 
  Hays 
  described 
  it 
  as 
  fol- 
  

   lows. 
  It 
  was 
  originated 
  from 
  a 
  single 
  plant, 
  

   From 
  among 
  400 
  plants 
  of 
  " 
  Blue 
  stem 
  ; 
  sev- 
  

   eral 
  of 
  the 
  best 
  were 
  chosen, 
  each 
  growing 
  sep- 
  

   arately, 
  a 
  foot 
  apart 
  in 
  every 
  direction. 
  Each 
  of 
  

   the 
  selected 
  plants 
  yielded 
  500 
  or 
  more 
  grains 
  of 
  

   wheat, 
  weighing 
  10 
  or 
  more 
  grams. 
  The 
  seeds 
  

   from 
  these 
  selected 
  plants 
  were 
  raised 
  for 
  a 
  few 
  

   years 
  until 
  sufficient 
  was 
  obtained 
  to 
  sow 
  a 
  

   plot. 
  Then 
  for 
  several 
  years 
  the 
  new 
  strains 
  

   were 
  grown 
  in 
  a 
  field 
  beside 
  the 
  parent-variety. 
  

   One 
  of 
  them 
  was 
  so 
  much 
  superior 
  that 
  all 
  

   others 
  were 
  discarded. 
  It 
  was 
  the 
  one 
  named 
  

   " 
  Minnesota 
  No. 
  169. 
  " 
  For 
  a 
  large 
  area 
  of 
  

   Minnesota 
  this 
  wheat 
  seems 
  capable 
  of 
  yielding 
  

   at 
  least 
  1 
  or 
  2 
  bushels 
  more 
  grain 
  per 
  acre 
  than 
  

   its 
  parent 
  variety, 
  which 
  is 
  the 
  best 
  kind 
  com- 
  

   monly 
  and 
  almost 
  universally 
  found 
  on 
  the 
  

   farms 
  in 
  southern 
  and 
  central 
  Minnesota. 
  

  

  It 
  would 
  be 
  quite 
  superfluous 
  for 
  our 
  present 
  

   purpose 
  to 
  give 
  more 
  instances. 
  The 
  fact 
  of 
  

  

  