Explanation:

 Canal irrigation is the most important form of irrigation in several parts of world mostly in developing countries. It is cheaper and had greatest advantage in the river valley regions. Canal irrigation in India is one of the principal methods used for improving the growth of the crops. In India, U.P. stands first use of canal irrigation, followed by Punjab and Haryana, Rajasthan. After wells and tube wells, canal irrigation is the second most important irrigation source.