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WAEC Agricultural Science 2017 Question 7

Question 7

Farm Machinery and Mechanisation

Study the illustration of farm implements below.
The function of the part labelled II is to

Diagram for this question
  1. A.make horizontal cuts into the soil.
  2. B.make vertical cuts into the soil.
  3. C.roll over obstacles.
  4. D.remove soil from the disc.
Show the answer and explanation

Answer: D (remove soil from the disc.)

Explanation

Scrapers on a disc plough keep soil from sticking to the discs.