State four factors that contribute to the competitive ability of the weeds

  • Produce large quantities of seeds.
  • Seed remain viable for a long time
  • Have effective mechanism of dispersal
  • Some have the ability to propagate both by seeds and vegetatively
  • Have elaborate rooting system
  • Some have underground structures difficult to control
  • Some are able to survive with limited nutrients
  • Some weeds are allelopathic
  • Some are able to compress their life cycle
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