% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/diagnostics-histosols-usda.R
\name{sulfidic_materials_usda}
\alias{sulfidic_materials_usda}
\title{Sulfidic materials helper (USDA, KST 13ed Ch 3, p 49)}
\usage{
sulfidic_materials_usda(pedon, max_top_cm = 100, min_thickness_cm = 15)
}
\arguments{
\item{pedon}{A \code{\link{PedonRecord}}.}

\item{max_top_cm}{Default 100.}

\item{min_thickness_cm}{Default 15.}
}
\value{
A \code{\link{DiagnosticResult}}.
}
\description{
Pass when sulfidic materials (soft, dark, sulfide-rich) are
present within \code{max_top_cm}. Proxy: sulfidic_s_pct >= 0.75
AND in a layer >= 15 cm thick.
}
