agridat (version 1.23)

evans.sugarcane.uniformity: Uniformity trial of sugarcane

Description

Uniformity trial of sugarcane in Mauritius.

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.

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
}