Title of article :
Soil resistance and resilience to mechanical stresses for three differently managed sandy loam soils
Author/Authors :
E. Arthur، نويسنده , , P. Schj?nning، نويسنده , , P. Moldrup، نويسنده , , L. W. de Jonge، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Abstract :
To improve our understanding of how clay-organic carbon dynamics affect soil aggregate strength and physical resilience, we selected three nearby soils (MFC, Mixed Forage Cropping; MCC, Mixed Cash Cropping; CCC, Cereal Cash Cropping) with identical clay content and increasing contents of organic carbon (CCC MCC > CCC). After wet–dry cycles, the MFC soil showed a significantly greater resilience for all three indicators (ka, e and ε). Resilience (ka, and e) after freeze–thaw cycles was significantly lower for the CCC soil than the MFC and MCC soils. A significant positive correlation between resistance and resilience was observed for ka and e but not for ε. Resilience to compaction was found to be independent of the soil properties monitored.
Keywords :
Clay dispersibility , Compaction , Air permeability , tensile strength , Friability , void ratio