*2.5. Variables Measurements*

In the plots where the study was carried out, the length, longitudinal and transverse slope, texture, apparent density, initial moisture contents, and saturation were measured. The first three were measured using digital topography equipment, the texture was obtained in the laboratory through mesh analysis and the Bouyoucos hydrometer, the apparent density (ρa) was obtained using the known volume cylinder method, the initial moisture content by means of a calibrated sensor TDR 300® (Spectrum Technologies, Inc., Aurora, IL, USA), and the moisture saturation content was assimilated to the total porosity of the soil obtained through the relationship φ = 1 − ρa/ρs, where ρ<sup>s</sup> is the density of the quartz particles taken as 2.65 g/cm3. For the laboratory measurements, six samples were collected from each plot at random at a depth of 0–30 cm. Later they were mixed, and a homogeneous sample was the one that was analyzed. The USDA triangle was used to classify the soil samples.
