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In both the World Reference Base for Soil Resources (WRB) [1] and the USDA soil taxonomy, [2] a Histosol is a soil consisting primarily of organic materials.They are defined as having 40 centimetres (16 in) or more of organic soil material starting within 40 cm from the soil surface.
A sapric is a subtype of a histosol [1] where virtually all of the organic material has undergone sufficient decomposition to prevent the identification of plant parts and even fecal matter. [2] [3] Muck is a sapric soil that is naturally waterlogged or is artificially drained.
A soil family category is a group of soils within a subgroup and describes the physical and chemical properties which affect the response of soil to agricultural management and engineering applications. The principal characteristics used to differentiate soil families include texture, mineralogy, pH, permeability, structure, consistency, the ...
An English translation of soil types defined in "référentiel pedologique français" can be done this way. it ... Histosol mesic; Histosol recouvert; Histosol sapric;
Tropical peat is a type of histosol that is found in tropical latitudes, including South East Asia, Africa, and Central and South America. [2] Tropical peat mostly consists of dead organic matter from trees instead of spaghnum which are commonly found in temperate peat. [ 3 ]
The World Reference Base for Soil Resources (WRB) is an international soil classification system for naming soils and creating legends for soil maps. The currently valid version is the fourth edition 2022. [ 1 ]
The main processes of soil formation of oxisols are weathering, humification and pedoturbation due to animals. These processes produce the characteristic soil profile . They are defined as soils containing at all depths no more than ten percent weatherable minerals , and low cation exchange capacity .
Entisols are common in the paleopedological record ever since the Silurian; however, unlike other soil orders (oxisol, ultisol, gelisol, etc) they do not have value as indicators of climate. Orthents may, in some cases, be indicative of an extremely ancient landscape with very little soil formation (i.e., Australia today).