Discussion
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
Answer: A
The attachment is the jointer.
A jointer is a small plough bottom, a miniature mouldboard, fixed to the beam ahead of the main bottom. It skims a narrow, shallow strip off the top of the furrow slice and turns surface trash, weeds and roots towards the main furrow, so that the mouldboard then buries them completely. That is exactly the description in the question.
A coulter is a disc or knife that cuts vertically through the soil and trash ahead of the share, but it does not turn a furrow. A subsoiler is a heavy tine that breaks hardpan well below normal ploughing depth. A weed hook is a curved rod or chain that drags tall weeds into the furrow; it is not a plough bottom.
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