% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/diagnostics-rsg-tier2.R
\name{chernozem_strict}
\alias{chernozem_strict}
\title{Chernozem RSG gate (strengthened, WRB 2022 Ch 4, p 111)}
\usage{
chernozem_strict(pedon, min_bs = 50, max_top_cm = 50)
}
\arguments{
\item{pedon}{A \code{\link{PedonRecord}}.}

\item{min_bs}{Numeric threshold or option (see Details).}

\item{max_top_cm}{Numeric threshold or option (see Details).}
}
\description{
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.
}
\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 \code{chernozem()} diagnostic remains available as a
less-strict variant; \code{chernozem_strict()} is what the v0.3.4
key.yaml uses for the CH RSG.
}
