Correct option is A
The Mould board plough is primarily used for primary tillage. It is a type of plough that is designed to turn over the soil, breaking up and loosening the ground. This helps in aerating the soil, burying crop residues, and preparing the land for subsequent cultivation.
It helps to loosen compacted soil, incorporating organic matter into the soil.
Primary tillage ensures the soil is in a condition suitable for sowing or planting crops.
Additional Information:
Secondary tillage: Performed after primary tillage, involves processes like harrowing or cultivating, which smooth the soil surface and prepare the seedbed.
Sowing: This refers to the act of planting seeds into the prepared soil.
Land levelling: A process of adjusting the soil surface, usually done with a levelling board or land grader.