Type of soil in the Bodenkunde different manifestations of soils, which are classified world-wide according to several different systems, see called soil classification and/or soil systematics.
If one up-digs soils, are regarding substrate and/or colouring differentiated "layers" to recognize, which are called soil horizons. (The term layers refers in the Bodenkunde only to forms of sedimentation, a process of the Lithogenese.)
The differentiation results on the one hand from the raw materials (soil types) for the soil formation (Pedogenese), on the other hand from soil-chemical processes. These arise among other things as a result of different climatic influences, the water regime, the vegetation, the Bodenfauna, if necessary the treatment, the immissions and the landschaftliche environment (ex.: In lowering or Flussauen water accumulates). Between these factors among themselves various, partly fed back influences exist.
Soil horizons emerge in different characteristic combinations. These are divided systematically in soil types. Here underground formations in the Bodenprofil are described, with which similar chemical and physiksalische changes produced agreeing characteristics and thus similar horizons and horizon combinations. The type of soil marks the development condition of a soil.
The differences in the horizons can be different origin. Often organic or mineral materials are loosened, relocated and deposited in storage horizons.
It is important that soil types arise rarely in "pure form", but taking place pedogenetische processes combinations and transitions of soil types to find often through at the same time or successively are. These lead - depending upon development for the classification of Bodensubypen (transition and Abweichungssubtypen) and again a set of different developments can be determined for each type of soil, and thus the relationship of the individual soil types to be described. In the landscape the different soil types (and/or Subtypen) appear as small-area mosaic (soil company), since the individual locations in the effect of the soil-forming factors differ and often a lateral exchange of material takes place.
The classification of the following soil types takes place hierarchically (department of, class, type, Subtyp, after soil-systematic units. The working group soil systematics of the German Bodenkundlichen society, works on systematics valid in Germany today (2006) and develops it further. The current conditions are in the Bodenkundlichen mapping guidance (at present 5. Edition, 2005) represented.
Internationally in particular two classification systems for soils are very common, the USDA Bodenklassifikation and the FAO soil classification.
The USDA classification divides all soils world-wide in twelve orders, which are then subdivided more finely in subordinations, families, etc.
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