% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/diagnostics-histosols-usda.R
\name{soil_temperature_regime_usda}
\alias{soil_temperature_regime_usda}
\title{Soil temperature regime helper (USDA, KST 13ed Ch 3, pp 53-58)}
\usage{
soil_temperature_regime_usda(
  pedon,
  target = c("gelic", "cryic", "frigid", "mesic", "thermic", "hyperthermic", "isofrigid",
    "isomesic", "isothermic", "isohyperthermic")
)
}
\arguments{
\item{pedon}{A \code{\link{PedonRecord}}.}

\item{target}{Character, one of the recognized regimes.}
}
\value{
A \code{\link{DiagnosticResult}}.
}
\description{
Returns TRUE when \code{pedon$site$soil_temperature_regime}
matches \code{target}. Temperature regimes:
\itemize{
  \item "gelic":     MAST < 0 C (and permafrost present)
  \item "cryic":     MAST 0-8 C, summer < 15 C
  \item "frigid":    MAST < 8 C, summer >= 15 C
  \item "mesic":     MAST 8-15 C
  \item "thermic":   MAST 15-22 C
  \item "hyperthermic": MAST >= 22 C
  \item Plus iso- variants (low summer-winter difference)
}
}
