Fig. 2. Experiment 2 mean 0 to 6 cm soil depth (A) pHw values (soil pH of 1:1 H₂O:soil suspension) and (B) pH_KCl values (soil pH of 1:1 1 M KCl:soil suspension), or 6 to 12 cm soil depth (C) pHw, and (D) pH_KCl values by CaCO₃ application rate and antecedent cultivation procedure; 2 yr following treatment. For each graph pane (A–D), significant differences do not exist between means having overlapping error bars (Fisher's least significant difference, = 0.05).