Figure 3

Cumulative carbon mineralization (mg CO2-C kg−1 soil) as affected by zinc oxide (nZnO) and rice-straw derived biochar over 64 days of incubation. Cumulative C mineralization in different BC, nZnO and BC + nZnO treatments for a given date have been plotted in different panels (e.g. panels A, C, E) for the purpose of simplification. Different small letters on treatment points across three panels represent post-hoc HSD difference at 95% confidence interval.