Fig 4. Scatter plots of 5-fold cross-validation errors for soil organic carbon (ORCDRC), pH in water (PHIHOX), bulk density (BLD), soil texture fractions (SNDPPT, SLTPPT and CLYPPT), Cation Exchange Capacity (CEC), total nitrogen (NTO), exchangeable bases (EXBX), total Aluminium (ALUM3S), exchangeable acidity (EACKCL), exchangeable Potassium (EXKX), exchangeable Calcium (ECAX) and exchangeable Magnesium (EMGX).

See also Table 2.