#' 31 Native Populations of Maize from Province of Buenos Aires
#'
#' These populations are part of collection of local populations corresponding
#' to different races that are conserved in the Active Germplasm Bank of INTA
#' Pergamino Experimental Station, Argentina.
#'
#' @usage data("maize_pop")
#'
#' @format A data frame with 10 characteristics of 31 maize populations in two
#' different conditions corresponding to production areas of Buenos Aires.
#' Since the variables are repeated in both places the data frame has a total
#' of 20 variables, 10 for an environment and evaluated them in the other
#' conditions. First and second conditions the numerical vectors are the
#' following:
#'
#' \describe{
#' \item{\code{LMZ}}{a numeric vector with ear length(cm), in first condition}
#' \item{\code{DMZ}}{a numeric vector with ear diameter (mm),in first
#' condition}
#' \item{\code{AGR}}{a numeric vector with grain width (mm),in first condition}
#' \item{\code{LGR}}{a numeric vector with grain length (cm), in first
#' condition }
#' \item{\code{PROL}}{a numeric vector prolicicacy (ears/plant), in first
#' condition}
#' \item{\code{GRXM}}{a numeric vector with grains by meter in first condition}
#' \item{\code{PESO_1000}}{a numeric vector with weight of 1000 grains (grs)}
#' \item{\code{REND}}{a numeric vector with yield (kg/ha), in first condition}
#' \item{\code{ALTPL}}{a numeric vector height of the plant (cm) in first
#' condition}
#' \item{\code{ALTMZ}}{a numeric vector with height of ear insertion (cm) in
#' first condition}
#' \item{\code{LMZ}}{a numeric vector with ear length(cm), in second condition}
#' \item{\code{DMZ}}{a numeric vector with ear diameter (mm),in second
#' condition}
#' \item{\code{AGR}}{a numeric vector with grain width (mm),in second condition}
#' \item{\code{LGR}}{a numeric vector with grain length (cm), in second
#' condition }
#' \item{\code{PROL}}{a numeric vector prolicicacy (ears/plant), in second
#' condition}
#' \item{\code{GRXM}}{a numeric vector with grains by meter in second condition}
#' \item{\code{PESO_1000}}{a numeric vector with weight of 1000 grains (grs) in second condition}
#' \item{\code{REND}}{a numeric vector with yield (kg/ha), in second condition}
#' \item{\code{ALTPL}}{a numeric vector height of the plant (cm) in second
#' condition}
#' \item{\code{ALTMZ}}{a numeric vector with height of ear insertion (cm) in
#' second condition}
#' }
#'
#' @details Ten quantitative variables were evaluated in two tests conducted
#' in the 2003/04 season in the localities Pergamino A INTA) and Ferre. These
#' variables allowed for morphologic-agronomic characterization and may be
#' influenced, to a certain extent, by environmental conditions.
#'
#' @references MARTICORENA, M.; BRAMARDI, S.; DEFACIO, R. (2010).
#' Characterization of maize populations in different environmental conditions
#' by means of Three-Mode Principal Components Analysis. Revista Ciencia e
#' Investigacion Agraria. 37(3): 93-105.
#'
#' @examples
#' data(maize_pop,package = "tuckerR.mmgg")
#' str(maize_pop); summary(maize_pop)
#' @keywords datasets
"maize_pop"
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