Relationship between air permeability, water conductivity and water content for undisturbed and disturbed soils

In order to analyze the relationship between soil air permeability characteristics and soil water conductivity characteristics, the variational characteristics of soil air permeability and water conductivity with the change of soil water content were studied, the air permeability characteristics and water conductivity characteristics for both undisturbed and disturbed soils were compared and the relationship between relative air permeability, water conductivity and water saturation were analyzed of wheat lands soil samples in Yangling of Shannxi province. The results show that soil water conductivity decrease with water content increasing and Water conductivity and air permeability for undisturbed soils is higher than that for disturbed soils, which confirms that soil structure and pores characteristics have enormous impact on the transport of water and air. In addition, although the variational tendency of these characteristics between undisturbed and disturbed soils is almost same, but curves of their variational tendency are not completely alignment. It can be concluded that the pore connectivity and bending degree are different between undisturbed and disturbed soils.