The paper aimed at a description of the direction of pore cross-sections in soil lessivé after different treatments during onion cultivation in the growing season and in changeable weather conditions. The measurements were taken on the basis of opaque soil blocks using computer assisted image analysis. For the statistical evaluation of the results the statistics of two-dimensional vectorial data (circular statistics) was used. In order to compare soil states the Pearson compatibility test χ2 was carried out. The results showed that the applied methods of the vectorial data statistics made it possible to define the distribution type of pore cross-sections considering their direction. The measurements proved that the applied cultivation treatments led to the soil material homogenisation, which was supported by a generally random pore cross-sections’ orientation. The tested soil in most cases showed an isotropic pore distribution. The observed anisotropy resulted mainly from the compaction and intensive or long-lasting rainfall.