Continuous Yield Increase Diagnose of Water-saving Irrigation in Arid Area of Soil and Water Loss on Loess Plateau

Unreasonable use of water resources has led to a series environment problems,such as water resources environment goes on worse,agricultural conditions are limited and agricultural development is restricted,the people's thought are traditional,backward,and conservative,agriculture production is in small scale,technique is backward,information can not be transmitted well,the area is in a disadvantage position,living environment is in the state of unbalance,soil erosion is serious,natural disasters occur frequently,the crop yield is low and unstable.After analyzing the relation between water-saving irrigation and crop yield,the three forms of water-saving irrigation on the ground,above the ground and underground are discussed with multi-angles.With the spot investigation,water-saving irrigation has become an effective method to develop agriculture and increase crop yield.