Fig. 4. Graphical representation of the specific volumes (V^µ and V), the specific pore volumes (Vp^µ and Vp^m), the air contents and the water pools (W, w_re, w_bs, w_st, and w_ip) of the pedostructure starting from a measured SC. V^µ is the specific volume of primary peds, equal to (Vp^µ + V_s) = [max (w_re)_w + w_{bs w} + V_s], and _w is the water bulk density.