No pH changes were observed
along the various treatments with plants. Soil pH in pots with plants
was larger than in pots without plants (Table 4). In non-sown pots,
pH was slightly lower (not significantly) after 71 days in the pots
that had been treated with 10 and 15 ton ASi ha−1 than in both the
control and the 1-ton ASi ha−1 pots. In sown pots, pH did not change
significantly with ASi treatments as compared to the control pots.
Fig. 5 presents the results of the DTPA-TEA extractions performed
on the soil collected from the pots after wheat harvest. In
pots both with and without plants, DTPA-extractable Cd concentrations
slightly decreased in all ASi treatments, but this decrease