Fig. 3. (a) Mean pH and (b) concentrations of total organic C (TOC), (c) NO₃–N, (d) K, (e) Ca, (f) Mg, (g) Mn, (h) Zn, and (i) Al in soil solution at the 0.15-, 0.3-, 0.8-, 1.2-, and 2-m depth of Cerrado (CE), degraded (DP), and productive (PP) pastures between 14 Oct. and 28 Apr. 1997-1998 and 1998-1999.