WRB 2022: an abrupt textural difference \<= 75 cm from the mineral soil surface and, within 5 cm directly above or below it, (1) stagnic properties in which the area of reductimorphic plus oximorphic features is \>= 50% and (2) reducing conditions in some parts of the volume with the reductimorphic features.
Arguments
- pedon
A
PedonRecord.- strict
Logical or
NULL; recorded in the evidence. Since v0.9.312 it changes nothing (the fallback it disabled is gone).
Value
A DiagnosticResult recording whether the diagnostic is present, the qualifying layers, and the supporting evidence.
Details
The two layers that meet at the abrupt textural difference stand for the
5 cm above and below it. Stagnic properties are those of
stagnic_properties; a claric layer directly above the
abrupt textural difference is stagnic (Ch 3.2.14, criterion 4) and its
whole area counts as reductimorphic. Since v0.9.312 the abrupt textural
difference has its transition criterion (boundary_distinctness),
the depth limit of 75 cm is applied, and the v0.2 planic_features
fallback (clay doubling at an abrupt boundary, with no redox evidence),
which is not in WRB 2022, is gone.