Differences in concentrations and fractions of aluminum and heavy metals between aggregate interior and exterior.

aluminio aluminium bioavailability biodisponibilidad cadmio cadmium cation cationes cations chrome chromium cinc cobre copper cromo cuivre fer forest soils grassland soils heavy metals hierro ion exchange ion exchange capacity iron lead manganese manganeso metales pesados nickel plomb plomo soil morphological features soil organic matter soil structural units suelo de praderas suelo forestal trait morphologique du sol unidades estructurales de suelos zinc