Subtopic: Three point hitches – free link and restrained link operations
Question Statement:
For which of the following field operations is 'Position Control' of the tractor hydraulic lift system exclusively recommended over 'Draft Control'?
Options:
(A) Operating a rear-mounted rotary tiller (rotavator) or broadcast fertilizer spreader at a fixed height above the ground
(B) Deep plowing with a mouldboard plough in undulating terrain
(C) Subsoiling hard clay soil hardpan
(D) Chisel plowing to break hardpan at maximum soil resistance
Answer Key:
A
Step-by-Step Solution & Explanation
Position control locks the implement at a fixed vertical height relative to the tractor chassis. It is strictly required for above-ground implements (fertilizer broadcasters, spray booms, mowers) and rotary tillers, where draft fluctuations must not alter cutting depth.