Effects of combined application of N, P and K on yield and quality of watermelon in gravel-mulched fields Reduction of nitrogen fertilizer application under different crop rotation systems in paddy fields of Taihu Area Effects of Postponed Application of Nitrogen Fertilizer on Yield and Physiological Characteristics of Flag Leaf in Wheat under Post-Anthesis Heat Stress The Influences of Different Nitrogen Types and Dose Rates on Alpine Meadow Aboveground Biomass and Nutrients in Cheng Duo Effect of Nitrogen Fertilizer Application on Development of Boll and Fiber Quality in High Fiber Quality Cotton Effects of combined application of nitrogen and phosphorus on diurnal variation of photosynthesis at grain-filling stage and grain yield of super high-yielding wheat. nteractive Effect of Split Application of Nitrogen and CO2 Elevation on Photosynthesis,Matter Accumulation and Yield of Winter Wheat