% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/diagnostics-properties-wrb-v033.R
\name{abrupt_textural_difference}
\alias{abrupt_textural_difference}
\title{Abrupt textural difference (WRB 2022 Ch 3.2.1)}
\usage{
abrupt_textural_difference(pedon)
}
\arguments{
\item{pedon}{A \code{\link{PedonRecord}}.}
}
\value{
A \code{\link{DiagnosticResult}} recording whether the diagnostic is present, the qualifying layers, and the supporting evidence.
}
\description{
Sharp clay-content increase between two superimposed mineral layers
meeting all of:
\itemize{
  \item underlying clay \\>= 15\% AND thickness \\>= 7.5 cm;
  \item underlying starts \\>= 10 cm below mineral soil surface;
  \item underlying has, vs overlying: 2x clay if overlying < 20\%, OR
        \\>= 20pp (absolute) more clay if overlying \\>= 20\%;
  \item transitional layer, if any, \\<= 2 cm.
}
v0.3.3 enforces criteria 1, 2, 3. The transitional-layer check is
deferred (the canonical horizon schema does not carry a "transitional"
marker; it can be added later via boundary_distinctness inspection).
}
