Question

Demerits of canal irrigation?

Answer 1

Here is your answer.⏬

Q) Demerits of canal irrigation.

Ans) The demirts of canal irrigation are:-

I) Only low level areas can be irrigated


ii) It can be used at a time when rivers are
in excess of flood.


III) Problem of salt effervescence and thereby reducing the fertility of soil .


iv) Problem of water logging and turning the adjoining areas to swamps.


v) To reduce the problem of waterlogging and salt effervescence the canal has to be lined with bricks , cement , mortar which is expensive.



Hope this helps you ^_^

Answer 2

Answer: Demerit of canal irrigation for 10th boards are

Explanation: there is uncertainty of water supply

Problem of salt effervescence due to over flooding of the fields which makes the soil unsuitable for farming

Water logging in case of unlined canals

( Only low land areas can be irrigated )