Concept information
PREFERRED TERM
acAcric
TYPE
-
http://stats-class.fao.uniroma2.it/ontologies/WRB#qualifier
DEFINITION
- (from Latin acer, sharp): 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 in some part ≤ 50 cm below its upper limit; 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)
URI
http://stats-class.fao.uniroma2.it/WRB/v2014/Acric
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