Which of the following is a disadvantage of using organic manure on the soil?

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Agricultural Science WAEC 1990

Which of the following is a disadvantage of using organic manure on the soil?

  • spreading of pests and diseases checkmark
  • reducing the rate of evaporation from soil surfaces
  • improving the nitrogen content of soil
  • increasing the humus content of soil
  • preventing erosion and leaching

The correct answer is: A

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