The draft and total power requirement of a rotary cultivator operating in concurrent mode, as compared to a spring-tyne cultivator of equal cutting width under the same operating conditions, respectively are:
Options:
(A) higher and higher
(B) lower and lower
(C) lower and higher
(D) higher and lower
Official Answer Key:
C
Step-by-Step Solution & Explanation
A rotary cultivator's powered blades actively cut and throw soil, so the horizontal pull (draft) transmitted through the hitch is markedly lower than a passive spring-tyne tool. However, total power consumption is higher because most of the energy is delivered directly through the PTO/rotor shaft (rotary power) rather than as drawbar pull. Answer: C — lower draft, higher total power.
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