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An irrigation method used in Egypt, essentially a bucket on a rope attached to a weighted pole which allows the bucket to be lowered into the river then raised and poured into irrigation channels.
Irrigation first began in China in 500 B.C.
The most important invention of the Sumerian's was Irrigation. Irrigation is how the Sumerian's led their water through pipes, etc.
they were using irrigation.
Most irrigation methods are inefficient because water often evaporates or seeps into the ground before it reaches the crops.