% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/diagnostics-gelisols-usda.R
\name{limnic_usda}
\alias{limnic_usda}
\title{Limnic Subgroup helper (Histels)}
\usage{
limnic_usda(pedon, min_thickness_cm = 5, max_top_cm = 130)
}
\arguments{
\item{pedon}{A \code{\link{PedonRecord}}.}

\item{min_thickness_cm}{Default 5.}

\item{max_top_cm}{Default 130 cm (control section).}
}
\value{
A \code{\link{DiagnosticResult}}.
}
\description{
Pass when one or more limnic layers (coprogenous earth /
diatomaceous earth / marl) with cumulative thickness >= 5 cm
occur within the control section (KST 13ed, p 190).
}
\details{
Implementation: detects designation containing 'L' (KST notation
for limnic) OR \code{layer_origin == "lacustrine"}.
}
\references{
Soil Survey Staff (2022), KST 13ed, Ch. 3, p 45;
  Ch. 9 Hemistels / Sapristels.
}
