-CN: number of the curve varies with the humidity of the soil and the coefficient permeability saturation (Ksat) (Raes et al., 2012). KSAT worth about 50-250 mm/day.c. the method of determining the amount of water change (∆ S, mm)The formula computes the amount of water stored in the arable land:∆ S = S1-S2 (mm) 4.8Of which: -S1: is the amount of water stored was in day one (mm) (Verplancke, 2002);S1 = humidity of soil (cm3/cm3) * deep roots (m) * 1,000 (mm) 4.9-S2: is the amount of water in storage was in the second day (mm)
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