ABSTRACT
Use of ion-exchange resins to measure nutrient availability in soils was reported as early as
1951 (Pratt 1951) and 1955 (Amer et al. 1955). Since then, many journal articles have been
published on the use of ion-exchange resins in agricultural and environmental soil
research, mostly focusing on measuring nutrient availability in soil. Anion-exchange
resin extraction as a method to assess P availability in soil has been described earlier by
Olsen and Sommers (1982) and Kuo (1996). The principle of resin membrane extraction is
also briefly described and commented on by Havlin et al. (2005). A review of application
of ion-exchange resins in agricultural and environmental research has been provided by
Qian and Schoenau (2002a).
