Phosphorus loss and migration characteristics in paddy fields under different fertilization treatments Risk assessment in soil phosphorus environment of Guanxi pummelo orchard in Pinghe County, Fujian Province Phosphorus solubilizing bacteria growth and effects on soil phosphorus adsorption-desorption characteristics in reclaimed soils Effects of phosphorus supply on microbial carbon source utilization and functional diversity of maize rhizosphere Application and validation of AquaCrop model in simulating biomass and yield of oil flax in Northwest China Enzymological regulation of soil nutrient cycle in the piedmont region of North China Plain Soil nutrient and microbial biomass in the Loess hilly area of Ningxia under different plant rehabilitation patterns