Cation Exchange on Plant Roots Involving Aluminium: Experimental Data and Modeling

I. Introduction...................................................................................................228 II. Origin, Measurement, Variability, and Implications of the

Cation Exchange Capacity of Roots (CECR)..............................................228 A. Origin ................................................................................................228 B. Measurement.....................................................................................229 C. Variability..........................................................................................229 D. Implications ......................................................................................230

III. Aluminium Exchange on Roots ...................................................................231 IV. Modeling Cation Exchange on Roots ..........................................................235