A plough attachment, which is a miniature plough bottom that cuts a narrow, shallow furrow ahead of the shin and moves trash and roots toward the main furrow so that they are completely covered by the mouldboard, is called as
Options:
(A) Jointer
(B) Coulter
(C) Subsoiler
(D) Weed hook
Official Answer Key:
A
Step-by-Step Solution & Explanation
The jointer is precisely a miniature mouldboard-plough bottom mounted ahead of the shin of the main bottom. It skims a narrow, shallow furrow slice and throws surface trash, stubble and roots into the bottom of the main furrow, where the mouldboard then covers them completely — giving a clean, trash-free finish.
Why not the others:
- Coulter — a rolling disc or knife that only makes a vertical cut to separate the furrow slice; it does not lift or invert soil.
- Subsoiler — a deep-working tine that shatters hard-pan below normal tillage depth; not a surface trash-handling attachment.
- Weed hook — a simple rod or chain that drags trash into the furrow; it has no plough bottom and cuts no furrow.
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