Uptake and Use of Sparingly Soluble Phosphorus by Rice Genotypes with Different P-efficiency Effect of organic residues cycling on phosphorus nutrition in red paddy systems of south China Effects of Transplanting Density and Nitrogen Fertilizer on Yield Formation and N Absorption in a Two-line Intersubspecific Hybrid Rice “Liangyoupeijiu” Effect of different nitrogen application on rice yield and N uptake of white soil under wheat straw turnover Relationships between nutrient uptake,use efficiency and growth, and between nutrient partitioning patterns and biomass partitioning patterns in Fraxinus mandshurica seedlings supplied with different ratios of nitrogen forms