ABSTRACT
Empirical estimation of redistribution ƒ It is useful sometimes to characterize the degree of differentiation of profiles by the ratios of free iron and free aluminium contents in the A (or E) and B horizons: content in B/content in A (extraction with oxalate). Souchier (1971) proposed refinement of the index by assuming that, when there is no movement of free iron from the E to the B, its content will be regularly stepped between the C and E horizons; he introduced a coefficient K defined graphically and given by OB/OX (Fig. 11.8, left).
