Rajasthan has average annual rainfall ranges from 100 mm in Jaisalmer to 800 mm in Jalawar (Anonymous, 2010).
Except for a couple of months during a good monsoon season, the net water deficiency situation prevails throughout the year. In areas of recurrent water scarcity and long drought spells such as Udaipur (Raj.) deficit irrigation (DI) which involves irrigating less than full evapotranspiration (ETc) with mulch practice becomes a common practice in mitigating yield reductions. Thus, necessitates development of water management methods that maximizes water use efficiency.
The modern technology of drip irrigation is successfully practiced in many countries for orchards, vegetables, ornamental crops and as well as high value field crops. It is gaining momentum and its prospects in the years to come are expected to be very bright. Though India has the largest irrigation network, the irrigation efficiency does not exceed 40%. Due to water scarcity, the available water resources should be very effectively utilized through water saving irrigation technologies. The need of the hour is, therefore, to maximize the production per unit of water. Hence, further expansion of irrigation may depend upon the adoption of new systems such as pressurized irrigation methods with the limited water resources.