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Why are chars important to agriculture in Bangladesh?

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Map showing the course of the Brahmaputra River as it flows from southwestern China through northeastern India and into Bangladesh, with surrounding countries including Bhutan, Nepal, Myanmar, Pakistan, and Afghanistan labeled. The river's path is highlighted in blue, and major international boundaries are marked. — Brahmaputra River Brahmaputra River.

In the context of the Brahmaputra River, chars are important to the economy of Bangladesh because they serve as additional cultivable areas.1

These chars are sizable, newly deposited lands that appear and disappear seasonally due to the constant erosion and deposition of silt caused by the shifting courses of active rivers like the Jamuna. Because the river is never in the same place for two successive years, these landforms provide dynamic, albeit temporary, opportunities for agricultural expansion in the region.1