Greater water-use efficiency ...
Published by Chris Tolsma
Greater water-use efficiency depends on better agricultural practices alongside extra technology.Hydrogel technology will not be a economical option for rice farmers, for a small project it would be good option though. But there are several studies done focusing on rice farming. You should read papers like this http://www.iwmi.cgiar.org/Publications/SWIM_Papers/PDFs/SWIM05.PDF