Variety trial of potatoes, highly replicated

Usage

data("kirk.potato")

Format

A data frame with 380 observations on the following 5 variables.

row: row ordinate
col: column ordinate
rep: replicate (not block)
gen: genotype (variety)
yield: yield, pounds per plot

Details

A highly-replicated variety trial of potatoes planted in 1924 with check plots every 5th row. Entries were not randomized. The rod rows were planted in series across the field, the rows spaced five links apart (nearly 3.5 feet) and with 3.5 foot passes between the series.

The replicates are sometimes dis-jointed, so are not really blocks.

Source

Kirk, L. E. and C. H. Goulden (1925) Some statistical observations on a yield test of potato varieties. Scientific Agriculture, 6, 89-97. https://doi.org/10.4141/sa-1925-0088 (paywall) https://www.google.com/books/edition/Canadian_Journal_of_Agriculture_Science/TgIkAQAAMAAJ

References

None

Examples

if (FALSE) { # \dontrun{
  library(agridat)
  data(kirk.potato)
  dat <- kirk.potato
  libs(desplot)
  desplot(dat, yield ~ col*row,
          flip=TRUE, aspect=1,
          main="kirk.potato")

  # Match means in Table I
  libs(dplyr)
  dat 
} # }