_________ is referred as 'the universal solvent'. 

____________ is a technique by which the recharging of ground water is increased. 

Which among the following is a type of overhead irrigation set up in the fields and supplied with water by hoses from the sources of water?

_____________ was the ancient system of irrigation in India. 

A _________ is a barrier across flowing water that obstruct, directs or retards the flow, often creating a reservoir, lake or impoundment. 

Hirakud dam is constructed across which river?

On which one of the following river Mettur dam is constructed ?

In terms of water availability per person per annum, India ranks :

In which of the following areas is tube wells mainly introduced?

In which of the following areas in canal irrigation practically absent?