Photosynthesis Characteristics of Flag Leaf and Dry Matter Accumulation and Allocation in Winter Wheat under Supplemental Irrigation after Measuring Moisture Content in Different Soil Layers Differences of schima Superba Provanances in Seedling Dry Matter Accumulation and Allocation Effects of supplemental irrigation based on measuring soil water content on wheat photosynthetic characteristics and dry matter accumulation and allocation. Effects of sulfur plus resin-coated controlled release urea fertilizer on winter wheat dry matter accumulation and allocation and grain yield.