Soil aggregate stability is an essential soil property, influencing many soil behaviors. However, the relationships between drying and wetting cycles and aggregate stability dynamics with different initial aggregate size classes have not been clarified. This study was conducted to investigate the effects of drying and wetting cycles on aggregate stability under different breakdown mechanisms, and determine the effects of initial aggregate sizes on soil aggregate stability. A simulation experiment wasperformed on four initial aggregate sizes without organic matter amendment. Aggregate stability was measured by the method proposed by Le Bissonnais (1996), and the fragment size distribution was obtained simultaneously.
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