Deravání

Deravání is a term sometimes used to describe a phenomenon observed in certain types of soil, particularly those with a high clay content. It refers to the formation of small, irregular holes or cavities within the soil structure. These cavities can vary in size, from microscopic to several centimeters in diameter. The exact mechanisms causing deravání are not fully understood, but several factors are believed to contribute.

One primary cause is thought to be the shrinkage and swelling of clay minerals. When clay-rich soils become dry, the clay particles contract, creating gaps. Upon rewetting, the clay swells, but it may not completely fill the voids, leaving behind permanent cavities. Another contributing factor can be the decomposition of organic matter within the soil. As roots, dead plant material, or animal remains break down, they leave behind spaces. In some cases, burrowing organisms like insects or small animals can also create or enlarge these holes.

The presence of deravání can have implications for soil properties. It can affect soil aeration and drainage, potentially leading to waterlogging in some areas and excessively dry conditions in others. It may also influence the stability of the soil, especially in relation to construction or agricultural practices. The term is not a standard scientific classification but rather a descriptive term used in certain contexts to highlight these structural anomalies in soil.