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Chernozem RSG gate (strengthened, WRB 2022 Ch 4, p 111)

Source: R/diagnostics-rsg-tier2.R
chernozem_strict.Rd

WRB-canonical: chernic horizon AND, starting \<= 50 cm below the lower limit of the mollic horizon and (if a petrocalcic horizon is present) above it, a layer with protocalcic properties \>= 5 cm thick OR a calcic horizon AND base saturation \>= 50% from the surface to the protocalcic / calcic layer throughout.

Usage

chernozem_strict(pedon, min_bs = 50, max_top_cm = 50)

Arguments

pedon

A PedonRecord.

min_bs

Numeric threshold or option (see Details).

max_top_cm

Numeric threshold or option (see Details).

Details

v0.3.4 strengthens the previous v0.2 chernozem (which only required mollic + chernic_color) by adding the protocalcic / calcic gate and the BS \>= 50% requirement.

Note: the v0.2 chernozem() diagnostic remains available as a less-strict variant; chernozem_strict() is what the v0.3.4 key.yaml uses for the CH RSG.