ABSTRACT
Much progress has been made in the science of modeling phosphorus (P) fate and transport: from field-scale, event-based, empirical models to dynamic, watershedscale, process-based models. Nonetheless, some improvements are clearly needed in today’s models. This chapter’s purpose is to identify the most necessary changes to improve the modeling of P in the environment. Earlier chapters in this book have been drawn on heavily in developing the ideas presented here. Suggestions are grouped into eight general areas: (1) runoff; (2) soil P pools and model parameters; (3) leaching; (4) best management practices (BMPs); (5) in-stream processes; (6) P indices; (7) calibration and uncertainty; and (8) data for modeling.
