WRB-canonical: ferralic horizon \<= 150 cm AND no argic horizon starting above (or at the upper limit of) the ferralic, UNLESS the argic in its upper 30 cm or throughout has one or more of:
< 10% water-dispersible clay; OR
DeltapH (pH_KCl - pH_water) \>= 0; OR
\>= 1.4% soil organic carbon.
v0.3.4 enforces all three exception paths. The DeltapH check uses
ph_kcl and ph_h2o; the WDC check uses
water_dispersible_clay_pct (introduced in v0.3.3 schema).
Arguments
- pedon
A
PedonRecord.