CLAYr                   The Digital Soil Map of Sweden -topsoil clay
                        content
CLAYs                   SLU farm (Brogarden) soil sample data -topsoil
                        clay content
E                       Nash-Sutcliffe Modelling Efficiency (E)
mae                     Mean Absolute Error (MAE)
me                      Mean Error (ME)
mri                     mri
r2                      Coefficient of Determination (r2)
rmse                    Root Mean Square Error (RMSE)
