Which of the following is used for primary tillage?

Correct option is A

The correct option is (a) Ploughs. Ploughs are used for primary tillage to break, loosen, and aerate the soil.
(b) Cultivator – Used for secondary tillage to refine seedbeds.
(c) Planks – Used for leveling after tillage.
(d) Rollers – Used to compact the soil after plowing.
(e) Harrows – Used for secondary tillage to break clods and prepare a fine seedbed.