WORLD HISTORY

Detailed explanation-1: -The farmers in Sumer created levees to hold back the floods from their fields and cut canals to channel river water to the fields. The use of levees and canals is called irrigation, another Sumerian invention.

Detailed explanation-2: -Sumerian agriculture depended heavily on irrigation. The irrigation was accomplished by the use of canals, dams, rivers, and reservoirs. The frequent violent floods of the Tigris and the Euphrates Rivers meant that canals required frequent repair.

Detailed explanation-3: -With their ingenuity, the Sumerian people developed complex irrigation system and a written language. They were the first people to use the plow to lift the silt-laden soil of their crop fields and they invented the sailboat.

Detailed explanation-4: -They made canals, dikes, and ditches to ensure that their crops have enough water. When the flood season of the rivers is over, the farmers drain excess water through canals. Afterwards, they plow the fields and rake it repeatedly. The Sumerians planted in spring and by fall, they begin to harvest.

Detailed explanation-5: -The Sumerians figured out how to collect and channel the overflow of the Tigris and Euphrates rivers-and the rich silt that it contained-and then use it to water and fertilize their farm fields.