Rendzina

Rendzina (or Rendsina) is a soil type recognized in various soil classification systems, including those of Britain and Germany as well as some obsolete systems. They are humus-rich shallow soils that are usually formed from carbonate- or occasionally sulfate-rich parent material. Rendzina soils are often found in karst and mountainous regions.

The term Rendzina originated from an old Polish word "rzędzić", which means "to chatter". Soils of this type contain a significant amount of gravel and stones, which, during plowing, produce various sound effects (clicking, screeching, etc.), i.e., "talk" to the ploughman.

In the World Reference Base for Soil Resources, Rendzina soils would be classified as Leptosols, Chernozems, Kastanozems, or Phaeozems, depending on their specific characteristics.

Rendzina soils typically develop from solid or unconsolidated rocky material that is carbonate- or sulfate-rich.Limestone is by far the most common, but others include dolomite, gypsum, marble, chalk and marlstone. Alongside physical weathering, which breaks down the structure of rocky material, chemical weathering, in particular the dissolution of carbonate, contributes to Rendzina development. When water with dissolved carbon dioxide comes into contact with carbonate minerals, the carbonate is dissolved and leaches out with the water. The overall reaction is as follows:

CaCO₃(s) + H₂O(l) + CO₂(aq) → 2 HCO₃⁻(aq) + Ca²⁺(aq)

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