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WAEC Agricultural Science 2002 Question 13

Question 13

Soil Fertility and Plant Nutrition

Nitrogen is taken up by plant roots in the form of

  1. A.nitrate ion
  2. B.nitrite ion
  3. C.nitric acid
  4. D.nitrogen gas
Show the answer and explanation

Answer: A (nitrate ion)

Explanation

Plants absorb nitrogen mainly as nitrate (NO3−) ions.