Abstract:The results of a three-year field experiment of water application control for winter wheat, starting in 1999, conducted at the Yucheng Comprehensive Experimental Station (YES), Chinese Academy of Sciences (CAS), Yucheng County, Shandong Province, China, were analyzed. In this field trial the water control experiment was carried out with different soil depths and water contents. In order to know relative root growth, rate of biomass increase and grain yield, the experiment was originally designed with 12 tr...