PTF4Med: legacy data rescue for pseudo-continuous hydro-pedotransfer function in the Mediterranean region

This dataset was compiled to develop and validate two pseudo-continuous pedotransfer functions (PTFs), HYDRO-GRAV and HYDRO-VOL, for estimating gravimetric and volumetric soil water content across multiple matric potentials in Mediterranean region. The file, provided in Excel format, contains two sheets: HYDRO-GRAV and HYDRO-VOL. In the HYDRO-GRAV sheet, the field U reports gravimetric soil water content, while in the HYDRO-VOL sheet, it reports volumetric soil water content. Both sheets include the same set of predictors and metadata: SAND (sand content, %), CLAY (clay content, %), OC (organic carbon, %), Pot (soil matric potential, kPa), Dataset (source dataset name), ID (unique sample identifier), Location (site or region), Date (sampling date, when available), Latitude and Longitude (geographic coordinates), Layer description (description of the soil layer), Layer number (sequential number of the soil layer), and Upper limit and Lower limit (depth limits of the soil layer, cm). The dataset harmonizes legacy soil data from multiple Mediterranean sources, providing measurements of soil water content at different matric potentials. These data enabled pseudo-continuous modeling through artificial neural networks and were used to train and evaluate the HYDRO-GRAV and HYDRO-VOL models.