Fig. 2. Estimation errors in terms of (a) root mean squared residuals (RMSRs) and (b) mean residuals (MRs) of each of the eleven models and five data sets used to develop pedotransfer functions. HUN, Hungarian data set; EUR, European data set; ICO, intercontinental data set. Input parameters of models M1, M2 ... M11 are listed in Table 2.

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