% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/diagnostics-gelisols-usda.R
\name{vertic_subgroup_usda}
\alias{vertic_subgroup_usda}
\title{Vertic Subgroup helper (USDA, KST 13ed)}
\usage{
vertic_subgroup_usda(pedon)
}
\arguments{
\item{pedon}{A \code{\link{PedonRecord}}.}
}
\value{
A \code{\link{DiagnosticResult}}.
}
\description{
Pass when EITHER:
\itemize{
  \item Cracks within 125 cm of the mineral soil surface that
        are >= 5 mm wide through a thickness >= 30 cm AND
        slickensides or wedge-shaped peds in a layer >= 15 cm
        thick within 125 cm; OR
  \item Linear extensibility (LE) >= 6.0 cm between surface and
        100 cm (or to a densic/lithic/paralithic contact).
}
}
\details{
Implementation: tests cracks_width_cm >= 0.5 AND cracks_depth_cm
>= 30 AND slickensides present, OR sum(thickness * cole_value)
>= 6 cm.
}
