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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.
The World Reference Base for Soil Resources (WRB) defines "sapric" (sa) as a histosol having less than one-sixth (by volume) of the organic material consisting of recognizable plant tissue within 100 cm of the soil surface. [4]
Our example soil has the following characteristics: Field characteristics (described according to Annex 1 of the WRB Manual): A soil developed from loess shows a marked clay increase in around 60 cm depth and clay coatings in the clay-richer horizon. According to the landscape setting, we presume that high-activity clays dominate.
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 ...
Intrazonal soils have more or less well-defined soil profile characteristics that reflect the dominant influence of some resident factor of relief or parent material over the classic zonal effects of climate and vegetation. There are three major sub-types, two of which have two further sub-types each.
regulatory program for implementing SMCRA and 30 C.F.R. §§ 780.21(b), 784.14(b) (2008), and their approved equivalents in the Pennsylvania state regulatory program for implementing SMCRA.
By Paul Mohai, Byoung-Suk Kweon, Sangyun Lee, and Kerry Ard Air Pollution Around Schools Is Linked To Poorer Student Health And Academic Performance
An English translation of soil types defined in "référentiel pedologique français" can be done this way. it ... Histosol recouvert; Histosol sapric; Leptismectisol;
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