At the end of the incubation, soil pH, nutrient<br>availability (by Mehlich-3 and ammonium bicarbonate diethylene<br>triamine pentaacetic acid [AB-DTPA] extractions), and soil leachate<br>composition were evaluated. Biochar eff ect on soil pH was processand<br>rate-dependent. Biochar increased soil pH from 4.8 to 6.6 at the<br>high application rate (40 g kg−1), but was less eff ective than AgLime.
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