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Repeated application of the same pesticide to a soil sometimes leads to

  • A.Conversion of the pesticide into humus without microbial help
  • B.Enhanced degradation, as organisms able to break it down build up
  • C.Complete sterilisation of the soil after a few seasons
  • D.Permanent loss of the soil's ability to degrade anything

Answer: B

Once a population capable of using the compound establishes itself, each subsequent application is degraded faster than the last, which can shorten a product's useful life in the field. This adaptation is a recognised practical problem rather than a laboratory curiosity.

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