agridat (version 1.23)

coombs.rice.uniformity: Uniformity trial of rice in Malaysia

Description

Uniformity trial of rice in Malaysia

Usage

data("coombs.rice.uniformity")

Format

A data frame with 54 observations on the following 3 variables.

row

row

col

column

yield

yield in gantangs

Details

Estimated harvest date is 1915 or earlier.

Field length, 18 plots * 1/2 chain.

Field width, 3 plots * 1/2 chain.

References

None

Examples

if (FALSE) {
  library(agridat)
  data(coombs.rice.uniformity)
  dat <- coombs.rice.uniformity

  # Data check. Matches Coombs 709.4
  # sum(dat$yield)

  # There are an excess number of 12s and 14s in the yield
  libs(lattice)
  qqmath( ~ yield, dat) # weird
  
  libs(desplot)
  desplot(dat, yield ~ col*row,
          main="coombs.rice.uniformity",
          flip=TRUE, aspect=(18 / 3))
}