3 disadvantages of canal irrigation.
Answers
Answer:
Problem of salt effervescence and thereby reducing the fertility of soil . i
Problem of water logging and turning the adjoining areas to swamps.
To reduce the problem of waterlogging and salt effervescence the canal has to be lined with bricks , cement , mortar which is expensive.
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Answer:
Disadvantages of Canal Irrigation:
1. Due to imbalance in distribution of canal water, a situation of scarcity somewhere and water logging in other areas is caused due to collection of water there. It makes the soil unproductive as harmful underground salts and alkalies come to the surface level due to water logging. Land can also become marshy there.
2. Many diseases are caused due to spread of mosquitoes, worms and insects on account of stationary water in canals.
3. Sometimes efficient canal management results in excessive production of crops, due to which the farmers are not able to get suitable price for their product in the market.