Which underground water nourishes the plant roots by capillarity?

Which method of irrigation is called trickle irrigation?

What is the main advantage of irrigation?

Which irrigation method water is supplied to lower level by the action of gravity?

What is the total depth of water required by a crop during the entire period in the field?

What is the life period of thermal plant?

Which irrigation constant and continuous supply of water is assured throughout the crop period?

Which is the sheet of over flowing water?

What is the name of the structure placed in river to increase the depth of water?

What is the name of the impervious barrier constructed across a perennial river to raise the water level on the upstream side?

Which canal is aligned along a watershed? 

Which canal is also known as ridge canal?