Two diameters of disc infiltrometer(5 cm and 10 cm) and two distinctly textured soil(Yangling caly soil and Shenmu sandy loam soil) were used to carry out disc 3D laboratory infiltration experiment under five pressure heads(-1,-3,-6,-9,-12 cm H2O).Vandervaere formula was chosen as standard model,and then the time scales of determining soil sorptivety by Philip formula were analyzed according to Vandervaere equation.The results are as followed,for the two textured soil,soil sorptivety reduces as pressure hea...
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