Spatial analysis of soil acidity using geostatistical models based on GIS

Abstract

The main objective of this study is to review and evaluate three common interpolation methods namely: Inverse Distance Weighting (IDW), Radial Basis Function (RBF) and Ordinary Kriging (OK), and generate maps of soil pH using these methods. Studies were conducted within the limits of land use of RUP “Uchkhoz BGSHA” (Republic of Belarus, Mogilev region, Goretsky district). Based on cross-validation results, a polynomial function was identified as the best variogram model. In terms of interpolation accuracy, the investigated deterministic and geostatistical methods are located in the next descending row: RBF> IDW> OK.