How did irrigation systems help improve agricultural practices of the ancient Sumerians?

irrigation systems they helped grow more food and protect their fields from  over flooding

Explanation:

To irrigate their land, they dug out large storage basins to hold water supplies. Then they dug canals, human-made waterways, that connected these basins to a network of ditches. These ditches brought water to the fields. To protect their fields from flooding, farmers built up the banks of the Tigris and Euphrates.

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