Question

Disadvantage of perennial canals

Answer 1

Answer:

Disadvantages- Canal irrigation can cause water logging which can make the soil unproductive because water logging brings harmful salt and alkaline material to the surface level. Due to stationary water in canal many disease can be caused due to mosquitoes and insects.

Answer 2

1.Cost of construction is high.

2.Prone to water pollution.

3.Can irrigate only low lying areas.