Concept information
PREFERRED TERM
alAlic
TYPE
-
http://stats-class.fao.uniroma2.it/ontologies/WRB#qualifier
DEFINITION
- (from Latin alumen, alum): having an argic horizon starting ≤ 100 cm from the soil surface and having a CEC (by 1 M NH4OAc, pH 7) of ≥ 24 cmolc kg-1 clay throughout or to a depth of 50 cm of its upper limit, whichever is thinner; and having an effective base saturation [exchangeable(Ca + Mg + K + Na) / exchangeable(Ca + Mg + K + Na + Al); exchangeable bases by 1 M NH4OAc (pH 7), exchangeable Al by 1 M KCl (unbuffered)] of < 50% in half or more of the part between 50 and 100 cm from the mineral soil surface or in the lower half of the mineral soil above continuous rock, technic hard material or a cemented or indurated layer starting ≤ 100 cm from the mineral soil surface, whichever is shallower (2). (en)
NARROWER CONCEPTS
- jl Hyperalic (en)
URI
http://stats-class.fao.uniroma2.it/WRB/v2014/Alic
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