(P > 0.05). At the end of the incubation, soil pH levels of PBV and PBS
increased by 0.250.03 and 0.240.04 units, respectively.
3.3. Soil exchangeable properties after incubation
Soil CEC levels in biochar–soil treatments were not significantly
different (P > 0.05) from the levels inthe controls (Table 4), but those
in PBV (12.320.39 cmol kg1) and PBS (12.160.33 cmol kg1)