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WAEC Agricultural Science 2019 Question 20

Question 20

Soil Fertility and Plant Nutrition

In green manuring, crops are ploughed into the soil just before flowering in order to

  1. A.control soil pathogens.
  2. B.enrich the soil with nutrients.
  3. C.control soil erosion.
  4. D.increase the soil temperature.
Show the answer and explanation

Answer: B (enrich the soil with nutrients.)

Explanation

The green plants rot and add nutrients and organic matter.