In the semi-arid tropics (SAT) farmers practice calendar- irrigation scheduling, which generally in over irrigation and poor water use efficiency. lack of a simple decision tool to decide and quantity of water to be applied is a bottleneck. Excel-based decision support system termed Impact Calculator (WIC) is developed using collected at the ICRISAT, which were validated three pilot sites on farmers’ fields in Rajasthan, and Telangana. Field studies were conducted two land-form treatments (broad bed and furrow (BBF) and flat fields); and irrigation water was following two different methods (drip and ). The data collected at micro-watershed at the and three other sites showed that WIC be used under wide range of soil and rainfall . WIC simulated soil moisture was comparable the observed moisture data, which forms basis of irrigation scheduling. The WIC-based balance at these experimental sites showed that and amount of irrigation could be reduced by 30–40% using WIC-based irrigation scheduling without the crop yield. The WIC could be a tool for water resources planning and efficient at the field and watershed scale in SAT.
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Garg et al. (2016) studied this question.
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