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WAEC Agricultural Science 2022 Question 17

Question 17

Soil Fertility and Plant Nutrition

Potassium deficiency in cereal crops is indicated by

  1. A.browning of leaves from the tips and margins.
  2. B.yellowing of younger leaves.
  3. C.purpling of leaves.
  4. D.white and irregular spots on leaves.
Show the answer and explanation

Answer: A (browning of leaves from the tips and margins.)

Explanation

Lack of potassium makes leaf tips and edges brown and scorched.