R/ex9.r

In ExpDes: Experimental Designs Package

#' Vegetated: Split-plot in CRD
#'
#' @description Subset of data from an experiment that studied
#' the effect on soil pH of cover crops subjected to trampling
#' by cattle predominantly under continuous grazing system,
#' analyzed at different depths.
#' @docType data
#' @keywords datasets
#' @name ex9
#' @usage data(ex9)
#' @format A data frame with 48 observations on the following
#' 4 variables.
#'   \describe{
#'    \item{\code{cobertura}}{a factor with levels \code{T1}
#'    \code{T2} \code{T3} \code{T4} \code{T5} \code{T6}}
#'    \item{\code{prof}}{a numeric vector}
#'    \item{\code{rep}}{a numeric vector}
#'    \item{\code{pH}}{a numeric vector}
#'    }
#' @references GUERRA, A. R. Atributos de Solo sob Coberturas
#' Vegetais em Sistema Silvipastoril em Lavras - MG. 2010. 141p.
#' Dissertation (Master in Forest Engineering) - Universidade
#' Federal de Lavras, UFLA, Lavras, 2010.
#' @author Eric Batista Ferreira,
#'  \email{eric.ferreira@@unifal-mg.edu.br}
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