Discusses the application of SPSC to identify and predict P-loss risk from a soil, with examples comparing high P-impacted dairy soils with low P-impacted pasture soils and evaluating SPSC values in a watershed. Details prediction of P loss in a column experiment and Bh horizon studies to demonstrate the use of SPSC to identify locations that are at P loss risk.
Gives examples of SPSC at various silvopastoral sites to demonstrate its use in evaluating P storage and release under treeless and tree-based agricultural systems.
Applies the SPSC concept to predicting P storage and release at a watershed or catchment level, using an example from beef cattle ranches in the Lake Okeechobee Watershed.
Explains the relationship of PSR and SPSC to equilibrium P concentrations and summarizes the power of the PSR and SPSC concepts in understanding P storage and release from a soil for soil risk assessment applications.