(d) Give three disadvantages of tank irrigation?
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Explanation:
Disadvantages of Tank Irrigation:
Tanks can easily get silted up. ...
In case of failure of rains, tanks also remain dry and hence are not a dependable source of irrigation.
Because of large area coverage and shallow depth, water from tanks either evaporates or sinks underground.
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Answer:
Disadvantages of Irrigation by Tanks:
Source of water in tanks is only from rainfall. ...
Rain water flowing towards tanks carries sediments also which reduces the depth of tanks. ...
Taking water from tanks for irrigation is very costly.
Tanks occupy large space because many natural tanks are very extensive.
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