Evaluation of Pedotransfer Functions (PTFs) for Some Soil Physical Properties

In recent years, studies on the estimation of another soil property using data on some soil properties (Pedotransfer Functions, PTFs), are widely used. In this context, increased interest in pedotransfer functions (PTFs) has been observed. In this study, the pedotransfer functions created for some soil physical properties (hydraulic properties, bulk density, penetration resistance, and aggregate stability) were investigated. Textural fractions (% sand, silt, and clay) and organic matter were determined as commonly used soil properties in the estimation models. In addition, the inclusion of the bulk density increased the accuracy of estimation in models of hydraulic conductivity and penetration resistance. Previous research had determined that a high coefficient of determination (R2) and low root means square error (RMSE) were used as important indicators in assessing the usability of the estimation models obtained. The estimated accuracy level of the models can be affected by parameters such as soil properties, the climate of the region, methods of analysis, homogeneity of data.