5Present Situation and Main Research Points of Water-saving Agricultural Technique Development in North China26-30,34
8Effects of Irrigation Methods on Salt Accumulation in Topsoil in Vegetable Field Mulched with Plastic Film41-44
9Water Regime Change Characteristics and Sustainable Development of Irrigation Areas Diverted Water from Lower Reach of the Huanghe River45-47,66
11Simulation and Analysis of Well-canal Combined Irrigation Patterns in Yinbei Irrigation District53-57