Fig. 2
SOC (A) and BD (B) as affected by the single and combined applications of RSB and NPK after maize and wheat harvesting (2020 and 2021). CK: the non-amended control, T1: 100% of N inputs as biochar, T2: the 100% mineral treatment, T3: 75%RSB + 25%NPK, T4: 50%RSB + 50%NPK, T5: 25%RSB + 75%NPK. Different letters specify significant variations among treatments