A 10-year field experiment was conducted to determine the effect of no-tillage (NT) on soil organic carbon (SOC) and nitrogen (N) in an irrigated rice-based cropping system. The results showed that concentrations of SOC, soil total N (STN), and soil organic N (SON) were higher at 0–5 cm depth but lower at 5–10 cm depth under NT than conventional tillage (CT), while at 10–20 cm depth the differences were not significant. Consequently, stocks of SOC, STN, and SON under NT were higher at 0–5 cm depth but lower at 5–10 cm depth than those unde...
