Soil aggregate degree increased with no-tillage years, especially in the surface layer.

土壤团聚度随免耕年限的增加而增加，表层增加更明显；

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The results showed that soil surface random roughness, soil cohesion and aggregate stability had significant difference among land use types.

结果表明，大南沟流域内土壤随机糙度、抗剪力和团粒稳定性具有一定的空间变化规律，不同土地利用方式间有显著差异。

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