Fig. 2 Near-saturated hydraulic conductivity K(-0.35) as predicted by Model 1, when all four horizons are included: (a) Model 1a, all four predictor variables are used; (b) Model 1b, only the best predictor variable is used. For example, regression equation of Model 1a is , where a, b, c, d, and e are the constants given by Table 4

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