Question

In which condition, mould board plough gives better performance than disc plough?

• A. Sticky soil only
• B. Weed infested soil only
• C. Hard soil only
• D. Hard and sticky soil.

Hint:

MB Plough $\rightarrow$ Complete inversion, excellent weed burial.
Disc Plough $\rightarrow$ Hard, stony, sticky, root-infested soils.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Mouldboard (MB) ploughs provide complete soil slice inversion and burial of vegetation, whereas disc ploughs roll over obstacles and are suited for hard, dry, and sticky conditions.

Step 2: Detailed Explanation:
A mouldboard plough is specifically designed to cut, lift, shatter, and completely invert the furrow slice, completely burying surface weeds, crop residue, and trash.
In contrast:
- Disc ploughs roll over roots, stones, and hard ground without breakage.
- Disc ploughs scour better in sticky/waxy soils where soil tends to adhere to mouldboard surfaces.
- MB ploughs give superior weed burial performance in weed-infested fields.

Step 3: Final Answer:
Thus, mouldboard plough performs better than disc plough in weed-infested soil only, matching option (B).