WAEC Agricultural Science 2024 Objective — Question 5

Question 5 of 50 from the West African Examinations Council (WAEC) Agricultural Science 2024 Objective paper, with the correct answer and a full explanation.

5. A major difference between disc harrow and disc plough is that A. (Use the diagram illustrating a source of farm power to answer questions 6 and 7.)

A. disc plough has more discs than disc harrow.
B. discs in disc plough are spaced far apart than in disc harrow.
C. disc plough has two pairs of gangs while disc harrow has one pair of gangs.Correct
D. disc plough has smaller discs than disc harrow.

Explanation

A disc plough is designed for primary tillage and has two sets of discs arranged in pairs, which help in turning over the soil; a disc harrow, used for secondary tillage, typically has one set of discs that smoothens and breaks up soil clods after ploughing.

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