Solodic Calcic Planosol KZ

A representative soil profile of Planosol from Kazakhstan. (Photo provided by Yakov Kuzyakov, revised.)

 

Planosols are soils with a mostly light-coloured horizon that shows signs of periodic water stagnation and that abruptly overlies a dense, slowly permeable subsoil with significantly more clay. The name Planosols was coined in 1938 in the United States of America, where now most of them are included in the Great Groups of the Albaqualfs, Albaquults and Argialbolls. The name has been adopted in Brazil (Planossolos).

 

Calcic (from Latin calx, lime): having a calcic horizon starting ≤ 100 cm from the soil surface. A calcic horizon (from Latin calx, lime) is a horizon in which secondary calcium carbonate (CaCO3) has accumulated in a diffuse form (calcium carbonate occurs as impregnation of the matrix or in the form of fine calcite particles of < 1 mm, dispersed in the matrix) or as discontinuous concentrations (veins, pseudomycelia, coatings, soft and/or hard nodules).

 

(Solodic) formerly saline soil, associated with semi-arid tropical environments, in which the A soil horizon has become slightly acid, and the B horizon is enriched with sodium-saturated clay. The term was used in soil classification systems derived from early Russian systems based on the work of V. V. Dokuchaev, but is no longer used in soil classification. (WRB)

 

For more information, visit;

wwwuser.gwdg.de/~kuzyakov/soils/WRB-2006_Keys.htm

 

For more information about Dr. Kuzyakov, visit;

www.uni-goettingen.de/de/212970.html

 

For more information about soil classification using the WRB system, visit:

www.fao.org/3/i3794en/I3794en.pdf

 

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