Figure 5
Percentage change in N2O production relative to soil with N fertilizer (S + N) only in mineral soil (MS) and in organic soil (OS). S + CB + N = Control soil with corn residue biochar and N fertilizer; S + PB + N = Control soil with pine bark biochar and N fertilizer; S + N + CPO = Control soil with N fertilizer and calcium peroxide; S + N + MPO = Control soil with N fertilizer and magnesium peroxide. Bar represents standard error, n = 3. * Indicates significant difference from S + N treatments in respective soil by Duncan Multiple Range Test at P = 0.05.
