A double cropping system is where two crops are grown in the same field over what period?

A double cropping system refers specifically to the practice of cultivating two distinct crops in the same field during a single growing season or year. Typically, this involves planting the first crop, harvesting it, and then planting a second crop within the same year, maximizing the productive use of the land.

The correct choice identifies a time frame that reflects the full cycle of both crops within a single year, emphasizing the continuity of agricultural production. While it may seem possible to complete this in shorter durations, the concept frames the overall agricultural production strategy over one entire year. This understanding is vital for efficient crop rotation and optimizing yields.

The other options suggest either shorter or misleading time frames that would not align with the definition of double cropping, where both crops need sufficient time to grow and mature within that same annual cycle.