This study are carried out to investigate the effects of double cropping system, such as winter whole crop barley followed by rice (WBFR) or after Sorghum × Sudan hybrid (WBASS), in paddy land on the properties of soil and water. A field study was conducted at Baeksan-myeon, Kimje, Jeonbuk province in Korea on clay loam soil for 3 years. All plots were arranged in completely randomized design with three replicates. The pH and the contents of T-N, P₂O? and organic matter (OM) in soil samples collected at the end of the experiment were remarkably higher t㏊n those at the beginning of the experiment (P＜0.05) in both WBFR and WBASS. The contents of an exchangeable cations (CEC) at the end of the experiment were remarkably higher t㏊n those at the beginning of the experiment (P＜0.05). The concentrations of NO₃-N, NH₃-N and PO₄-P in discharge and leaching water were not influenced by the cropping system.

• Nam Chul Jo
• Ki Choon Choi
• Sang Pil Na
• Chang Yoon
• Jong Geun Kim
• Wan Bang Yook