With climate changing, water is becoming the most critical natural resource. Much more than an economic resource, it is vital for the survival of every living being. Moreover the population is growing and competition for water between different sectors is intensifying.
Agriculture is the biggest water user, with irrigation accounting for 70% of global water withdrawals. The Green Revolution has led to the vast increase and overexploitation of ground and surface water for irrigation. The demand for increased production in areas that were traditionally rainfed has forced farmers to increase their use of irrigation. But water scarcity has motivated farmers to search for new options to manage water.