What is irrigation

The supply of water to crops at different intervals is known as irrigation. Sprinkler system; this system is more useful on the uneven land were insufficient water is not available. The sprinkler system is very useful for sandy soil. Drip system: in this system water falls drop by drop just at the position of the roots. So it is called drip system. It is a boon in region where c water is not available...

If its science then in simple way i will explain you

I think its not maths its science

 Irrigation is the application of controlled amounts of water to plants at needed intervals. Irrigation helps to grow agricultural crops, maintain landscapes, and revegetate disturbed soils in dry areas and during periods of less than average rainfall.

Irrigation is the process by which water is supplied to the crops. The frequency of irrigation varies from season to season and crop to crop. Plants contain nearly 90% water, and need water for proper development of flowers, fruits and seeds. Irrigation can be done by two methods - Traditional methods and Modern methods. Some of the traditional and modern methods are elucidated.
*Traditional methods of irrigation require animal and human labour to draw water. these are the cheapest methods available and are still in use. These include moat, chain pump, dhekli and rahat.
*Modern methods are the irrigation methods which are efficient in supplying water to the crops. They help us to use water economically without wastage. They include drip irrigation and sprinkler system which require power from solar energy or biogas.