All plants need water to grow. They get this water from the soil. In some place nature supplies all the water that is needed. But in other places people must find ways to supplement nature’s supply. The system of supplying water to ensure proper growth of plants and to increase the yield of crops is called irrigation.
The use of irrigation is one of the most important agriculture practices over developed. Only about fifteen percent of the world’s farmland is irrigated. But the irrigated land produces a much larger percentage of the world’s food supply.
Irrigation id practiced on every continent except Antarctica.
Irrigation is used to supplement rainfall. Even in humid areas, irrigation is needed to grow certain crops. For example, rice field must be flooded until harvest time.
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