Effects of different fertilization ways on the contents of N, P, K in new shoots and photobiological characters of tea tree. Difference in growth and nutrient accumulation of synthetic wheat with different D genome under nitrogen, phosphorus and potassium stresses Effects of nitrogen, phosphorus and potassium on photo-biological characteristics and amino acid components of tea plants in spring Studies on the Relationship between Endogenous Hormone of Leaf and Accumulation of Nitrogen, Phosphorus and Potassium of Plant as Well as the Cause of Boll Weig ht Raised in High Yield Cotton Assessing nutrient supplying characteristics of slow-release-compound fertilizer by ion exchange resin membrane Effect of nitrogen, phosphorus and potassium application on grain yield and qualities of high-oil and high-starch corn Distribution characteristics and seasonal dynamics of phosphorus and potassium in wetland ecosystem in the Sanjiang Plain Absorption and distribution of nitrogen, phosphorus and potassium in ginger Effects of regulates phosphorus and potassium on rice yield and nutrient absorption Effects of Nitrogen ,Phosphorus and Potassium on Root Vigor and Free Amino Acid Content of Astragalus membranaceus Seedlings Effects of Nitrogen ,Phosphorus and Potassium on Root Vigor and Free Amino Acid Content of Astragalus membranaceus Seedlings Effects of potassium on the secretion of proton and oxalate by ectomycorrhizal fungi and the concentrations of nitrogen,phosphorus and potassium in their hyphae Effects of phosphorus and potassium fertilization on potassium accumulation and utilization efficiency of relay-cropping soybean Farmland nutrient balance of nitrogen, phosphorus and potassium in Gansu Response differences in growth and yield formation of direct-sown and transplanted winter oilseed rape to N, P and K fertilization Effects of water-nitrogen management patterns and phosphorus and potassium fertilizer combined application on grain yield and quality of hybrid rice Gangyou 725 in rapeseed (wheat)-rice planting area of Chengdu plain Studies on Accumulation and Distribution of Dry Matter,Nitrogen,Phosphorus,and Potassium in Rhizome Lotus(Nelumbo nucifera Gaertn) Study on temporal and spatial characteristics of available soil nitrogen,phosphorus,and potassium among the forest ecosystem of Mt.Jinyun Effects of combined application of N, P and K on yield and quality of watermelon in gravel-mulched fields Characteristics of Nitrogen, Phosphorus, and Potassium’s Uptake and Partitioning in Mechanical Transplanting Japonica Rice