Fig. 1. Gaines-Thomas selectivity coefficients (KGT) vs. equivalent fractions of Ca2+ on the exchanger (ECa) in the (a) Oxisol and (b) Ultisol or Pb2+ on the exchanger (EPb) in the (c) Oxisol and (d) Ultisol.
Fig. 1. Gaines-Thomas selectivity coefficients (KGT) vs. equivalent fractions of Ca2+ on the exchanger (ECa) in the (a) Oxisol and (b) Ultisol or Pb2+ on the exchanger (EPb) in the (c) Oxisol and (d) Ultisol.