ECOLOGICAL BENEFIT OF LEVEL FURROW PLANTING IN DIFFERENT FERTILIZATION AND DENSITY REGULATION SOIL WATER AND WATER USE EFFICIENCY BY LEVEL FURROW Effects of potato-fababean intercropping on crop productivity and soil water under a plastic mulch and ridge-furrow planting system in a semiarid area Effects of different wheat cultivation methods on residual nitrate nitrogen in soil in dryland Effects of Irrigation and Planting Patterns on Consumption of Soil Moisture before Sowing and Water Use Efficiency in Winter Wheat Effects of Ridge and Furrow Planting for Rainfall Harvesting on Photosynthetic Characteristics and Yield in Corn in Semi-Arid Regions