﻿162 
  

  

  To 
  P.nTANY 
  

  

  153. 
  Rest 
  period 
  before 
  germination. 
  A 
  few 
  kinds 
  of 
  seeds 
  

   may 
  sprout 
  as 
  soon 
  as 
  they 
  are 
  ripe 
  ; 
  most 
  kinds 
  need 
  a 
  period 
  

   of 
  rest 
  and 
  comparative 
  dryness 
  before 
  they 
  will 
  grow. 
  The 
  

  

  FIG. 
  144. 
  Seed 
  and 
  seedlings 
  of 
  

  

  A, 
  section 
  of 
  seed, 
  showing 
  cotyledons 
  folded 
  together 
  and 
  inclosed 
  in 
  endosperm 
  ; 
  

  

  B, 
  seed 
  germinating, 
  the 
  taproot 
  descending 
  ;md 
  the 
  cotyledons 
  pushed 
  up 
  out 
  of 
  

   the 
  ground; 
  C, 
  seedling 
  with 
  cotyledons 
  expanded, 
  the 
  plumule 
  showing 
  as 
  ;i 
  

   bud 
  at 
  the 
  junction 
  of 
  their 
  leafstalks; 
  D, 
  seedling 
  further 
  developed; 
  cot, 
  coty- 
  

   ledons; 
  I, 
  first 
  ordinary 
  leaf; 
  /', 
  second 
  ordinary 
  leaf 
  

  

  importance 
  of 
  drying 
  seeds 
  is 
  well 
  shown 
  in 
  the 
  case 
  of 
  corn. 
  

   Kiln-dried 
  corn 
  has, 
  in 
  one 
  instance, 
  been 
  shown 
  to 
  yield 
  sixteen 
  

   bushels 
  per 
  acre 
  more 
  than 
  air-dried 
  seed 
  of 
  the 
  same 
  variety. 
  

  

  