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Several authors have reported that soil erosion and the chemical,physical processes are linked to the aggregate size and stability,whose determination is far easier.The objective of this study was to investigate between soil redistribution by moderate and intensive tillage and its impact on the properties of water-stable aggregate sizes and stability within landscape on hillslopes.In this experiment,traditional tillage by consecutive hoeing was performed 5 and 20 times on steeply sloping land of the Sichuan Basin,China,by using the methods of simulated tillage to analyze the impact of short-and long-term tillage on soil profile characteristics of soil aggregates at different slope positions.Soil organic matter (SOM) and 137Cs inventories were alsodetermined to demonstrate soil redistribution.