Maize - Potato - Sugarcane (ratoon) - Moong is the example of crop rotation for
JPSC Civil Services - 2021,
Answer: B
The key's answer is 2 years.
The sequence follows the calendar: maize in the kharif season, potato in the rabi season, then sugarcane planted in spring and kept as a ratoon crop, followed by a short summer crop of moong. Agronomy textbooks list maize-potato-sugarcane (ratoon)-moong as a standard two-year rotation, because the sugarcane and its ratoon carry the cycle into the second year before the land returns to maize.
One year is too short to fit sugarcane and its ratoon, and three or four years would leave fields empty that the sequence does not account for.
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