Constructed subqualifiers for other requirements
If a diagnostic horizon or a layer with a diagnostic property belongs to a buried soil
(see ‘2.5 Buried soils’, below), the Thapto- (from Greek thaptein, to bury) specifier
can be used to construct optional or additional subqualifiers. If used with a principal
qualifier, the Thapto- subqualifier must shift to the supplementary qualifiers.
The Thapto- subqualifiers are placed after the supplementary qualifiers that are listed
for the respective RSG and after any Bathy- subqualifier.
For soils with technic hard material, a geomembrane, a continuous layer of artefacts,
contiunuous rock or a cemented or indurated layer, subqualifiers with the Supra- (from
Latin supra, above) specifier can be constructed to describe the soil material above, if
the thickness or depth requirements of a qualifier or of its respective diagnostics are
not fulfilled, but all other criteria are fulfilled throughout in the soil material above
(e.g. Ekranic Technosol (Suprafolic)). If the Supra- specifier is used, the Epi- specifier
is not used.