A disadvantage of using organic manure on the soil is that

A disadvantage of using organic manure on the soil is that
  • A.
    it decreases the potassuim content of the soil
  • B.
    diseases spread fast
  • C.
    it increases the humus content of the soil
  • D.
    it reduces the rate of soil water evaporation
Correct Answer: Option B
Explanation
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