Experiment on feasibility of filling grouting in the slope repair in Dalangdian dam;

Effects of water deficit and supplemental irrigation at different growing stage on uptake and distribution of nitrogen, phosphorus and potassium in winter wheat;

Supplemental irrigation at over-wintering,jointing or filling stage significantly increased the nitrogen uptake by plant and decreased the nitrogen residual (47.

Research on technique of storing rainwater in pit for crop supplementary irrigation;

Effect of Supplementary Irrigation on Grain Yield and Water Use Efficiency of Different Wheat Cultivars

Based on analyzing the regional feature of weather & soil water deficit, the production integer-correction function of typical counties and the effects of rainfall on winter wheat, cron, apple production in different district is studied, the optimal supplementary irrigation periods of above plants in different districts are concluded.

The effects of rainfall on corn yield is studied, and the optimal corn growth stage for compensation irrigation in different regions also is presented in this paper.

It is concluded that the optimal compensation irrigation period is tillering before winter and reviving jointing stage in the north of Shaanxi hilly ar.