Uniformity trial of sugarcane

Usage

data("evans.sugarcane.uniformity")

Format

A data frame with 710 observations on the following 3 variables.

row

row ordinate

col

column ordinate

yield

plot yield

Details

A field of ratoon canes was harvested in 20-hole plots.

Described in a letter to Frank Yates written 21 May 1935.

Field length: 5 plots x 50 feet (20 stools per plot; 30 inches between stools) = 250 feet

Field width: 142 plots x 5 feet = 710 feet

This data was made available with special help from the staff at Rothamsted Research Library.

Source

Rothamsted Research Library, Box STATS17 WG Cochran, Folder 8.

References

None.

Examples

if (FALSE) {
  data(evans.sugarcane.uniformity)
  dat <- evans.sugarcane.uniformity
  libs(desplot)
  desplot(dat, yield ~ col*row,
          flip=TRUE, aspect=(5*50)/(142*5), # true aspect
          main="evans.sugarcane.uniformity")

  table( substring(dat$yield,3) ) # yields ending in 0,5 are much more common
}