Rice is the staple food for 65% population of India. The demand for rice is expected to rise due to increase in population increase (1.6% year-1) and reduction in area under rice cultivation in next 15-20 years. Hence, there is a need to increase the productivity of rice to feed the burgeoning population. Water scarcity appears to be one of the major constraints affecting rice production across the globe. More than 80 percent of the fresh water resources in Asia are used for agriculture and about a half of it is used for rice production. Available estimates indicate that fresh water availability in India will be reduced to one-third by 2025. Therefore, future rice production depends on how we improve the water use efficiency of the rice crop. Reducing amount of water in irrigated rice production has become a matter of global concern and of late, water saving irrigation techniques has received renewed attention. Production of “more rice for every drop of water used” will be a guiding principle for rice cultivation in future. There are several options to improve the water use efficiency in rice production.
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