Effects of Ridging with Mulching on Yield and Water Use Efficiency in Winter Wheat in Semihumid Drought-Prone Region in China Effects of Nitrogen Application Depth on Water Consumption Characteristics and Dry Matter Accumulation and Distribution in Rainfed Wheat Effects of Nitrogen Application Rate on Water Consumption Characteristics and Grain Yield in Rainfed Wheat Effects of long-term no-tillage with straw mulch on photosyntheticcharacteristics of flag leaues and dry matter accumulation and translocation of winter wheat in dryland