R/sweetpotato.R

In myaseen208/agricolae: Statistical Procedures for Agricultural Research

#' @title Data of sweetpotato yield
#' @name   sweetpotato
#' @docType data
#' @keywords datasets
#' @usage data(sweetpotato)
#' @description
#' The data correspond to an experiment with costanero sweetpotato made at the
#' locality of the Tacna department, southern Peru. The effect of two viruses
#' (Spfmv and Spcsv) was studied. The treatments were the following: CC (Spcsv)
#' = Sweetpotato chlorotic dwarf, FF (Spfmv) = Feathery mottle, FC (Spfmv y
#' Spcsv) = Viral complex and OO (witness) healthy plants.  In each plot, 50
#' sweetpotato plants were sown and 12 plots were employed.  Each treatment was
#' made with 3 repetitions and at the end of the experiment the total weight in
#' kilograms was evaluated. The virus transmission was made in the cuttings and
#' these were sown in the field.
#' 
#' 
#' @format 
#' A \code{data.frame} with 12 observations on the following 2 variables.
#' 
#'  @details
#'         \itemize{
#'         \item{\strong{virus}} a factor with levels cc, fc, ff, and oo
#'         \item{\strong{yield}} yield
#'         }
#' 
#' @references 
#' International Potato Center. CIP - Lima Peru
#' 
#' @source 
#' Experimental field.
#' 
#' @keywords datasets
#' @examples
#' 
#' library(agricolae)
#' data(sweetpotato)
#' str(sweetpotato)
#' 
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