Describes how isotherms are determined, explains some isotherm models, and gives details on sorption isotherm experiments to evaluate phosphorus sorption properties of soils and sediments. Provides additional details on equations for the Langmuir isotherm, the single point isotherm and the Freundlich isotherm.
Describes phosphorus loss from a Spodosol, focusing on P extracted from high P-impacted soils, low P-impacted soils, and wetland and stream sediments. Discusses applications of isotherm parameters in particular environmental situations.
Defines biochar and describes its history and its use as a soil amendment. Discusses implications of biochar for phosphorus retention, and the soil properties that influence the effects of biochar application.
Describes the P-Index, a site-specific tool for P risk assessment.
Explains the quick P field test, its advantages and uses, its methodology, its correspondence to Mehlich 1-P and water soluble P, and its detection limits.