WRB-canonical (multi-path):
Layer \>= 25 cm starting \<= 40 cm with gleyic properties throughout AND reducing conditions in some parts of every sublayer; OR
Mollic/umbric > 40 cm thick with reducing conditions some parts of every sublayer 40 cm below mineral surface to lower limit, AND directly underneath a layer \>= 10 cm with lower limit \>= 65 cm having gleyic properties + reducing conditions; OR
Permanent saturation by water \<= 40 cm.
Path 1 reads the layers of gleyic_properties (since
v0.9.312: the matrix colour, the layer underneath and the site's
groundwater, without the old decay-with-depth test) and of
reducing_conditions; since v0.9.312 the 25 cm may be made
of adjoining sublayers (Bg1 over Bg2), counted from the mineral soil
surface, and a layer whose redox reading is undecided leaves the gate
NA when it could complete the 25 cm. Path 3 is read from the
designation (W / saturated marker).
Arguments
- pedon
A
PedonRecord.- strict
Logical or
NULL. WhenNULL(default) it resolves viagetOption("soilKey.rsg_strict", FALSE).TRUEtightens path 1 and disables path 3.
Value
A DiagnosticResult recording whether the diagnostic is present, the qualifying layers, and the supporting evidence.
Details
Path 2 (since v0.9.315; until then it was not read) takes the horizon of
mollic or umbric_horizon: more than 40 cm
of its layers, reducing conditions in every layer of it that reaches
below 40 cm from the mineral soil surface, and directly underneath it
(top within 1 cm of its lower limit) adjoining layers, gleyic with
reducing conditions as in path 1, at least 10 cm thick and reaching 65 cm
or more from the mineral soil surface. Where layers below the horizon's
sure layers are undecided, its lower limit is undecided too, and every
lower limit it could have is tried: the path is then NA at most.
A horizon with no layer recorded underneath it does not meet item 2.b.