Hydrogel for Improving Water Use Efficiency of Agricultural Crops

We are experiencing the reduction in rainfall since last three years and also the soil moisture is reducung as a effect of less rainfall. We want to adopt some new technology for improving the water efficiency. We would conduct a sample field project to see how different technology can help us. Can we also use Hydrogel for improving water use efficiency for rice crop? Would it be a good option? We use bed sowing method for growing the rice crops. Hydrogel technique is new to us, can you help us with literature, case studies, your experiences please?