Effect of light from flowering to maturity stage on dry matter accumulation and nutrient absorption of summer maize. Study on N, P, and K Uptake and Fertilization of Young‘107‘Poplar Clone with Drip Irrigation Characteristics of dry matter, accumulation and distribution of N, P and K of superhighyield summer maize Study on N and K concentration and N and K balance in tobacco leaves Effect of waterlogging on nutrient uptake and transport of summer maize Characteristics of N,P and K uptake at different growth stages of spring wheat in irrigating region of Ningxia Effects of Varied Fertilization Strategy with N,P,K Nutrients on the Growth of Acacia mangium Saplings Characteristics of nitrogen, phosphorus and potassium uptake and accumulation of potato in Ningxia Characteristics of dry matter and nutrients accumulation and transformation of super-high yield spring maize