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Why did rice cultivation become important in the Ganges valley?

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Flag of India — India The Indian flag is also called the tricolor. The top band is saffron in color (signifying courage), the middle band is white (signifying peace and truth), and the bottom band is green (signifying fertility and growth). The wheel in the middle depicts the wheel of the law in the lion capital in Sarnath that Mauryan emperor Ashoka created.

In the Ganges valley, rice cultivation became significant during the early historic period, playing a crucial role in population growth and the establishment of new settlements. By approximately 2600 bp, these settlements had expanded eastward into the Ganges delta.1

The importance of rice was tied to the region's agricultural development, which benefited from fertile plains and a climate characterized by two monsoons, allowing for two harvests annually. Ancient agricultural practices in the valley included the use of the plow, iron implements, and systematic irrigation, which helped sustain a wide range of crops. As noted by the Greek envoy Megasthenes in the 4th century bce, the fertility of the soil and the widespread use of irrigation were fundamental to the productivity of the region.123