Regional analysis of groundwater phosphate concentrations under acidic sandy soils: Edaphic factors and water table strongly mediate the soil P-groundwater P relation

Prime determinants of groundwater o-P concentration in acid sandy soils: Direct control of groundwater table, Al-hydroxides and sorbed P on groundwater o-P. Additional significant indirect controls on groundwater o-P reveals the oversimplification of an index (e.g. PSD; phosphate saturation degree) in predicting P leaching to groundwater. (Bubble plot on the right shows Kendall tau correlation coefficients between groundwater o-P concentration and PSD-related soil variables).343