Soya Bean





Latin: Glycine max


Soya   beans   are   a   very   good   cash   crop   and   rotational   break   crop   for   maize,sorghum,  millet,  wheat,  etc...


Soyas  respond  very  well  to  residual  fertiliser  (fertiliser  applied  to  previous  crops). The soya  beans  manufacture  their  own  nitrogen  through  nodules  that  grow  on  their  roots. For  these  nitrogen making  nodules  to  develop  there  has  to  be a fungus called rizobium in the  soil. The  virgin  soil  in  our  region of  Africa  does  not  have  this  rizobium  present  so  the  rizobium  has  to  be dressed  onto  the  seed  at  planting.    


If  you  continue  using  soya  beans  in  your  rotation,  after  2  or  3  years  of dressing  the  seed,  the  levels  of residual  rizobium  in  the  soil  build  up  so  that  you  don’t  have  to  apply  it  to  the  seed  any  more.


Soya  beans  is  an  easy  crop  to  grow  except  that  there  are  two  critical operations  that  must  be  done  at  a  very high  standard.


Germinating  soya  bean  seeds  do  not  have  much  pushing  power. If  you  plant  them  too  deep  in  soft soil,  they  can  open  up  and  make  leaves  under  the soil,  and  die.    If  you  plant  them  at  4cm  and  you  get heavy  pounding  rain  followed  by  hot  sun,  the  soil  forms  a  hard  crust  and  soyas  ‘break  their  backs’ trying  to  push  through  the  soil  and  die.


It  is  very  important  to  plant  your  soya  seeds  shallow at  a  depth  of  between  1cm  and  2cm  (the thickness  of  a  matchbox).


It  is  better  to  plant  at  ½  cm  than  3  cm,  unless  you  have  very  soft  soil with

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