agridat (version 1.16)

goulden.barley.uniformity: Uniformity trial of barley

Description

Uniformity trial of barley

Format

A data frame with 400 observations on the following 3 variables.

row

row

col

column

yield

yield, grams per plot

Details

Yield in grams for 400 square-yard barley plots.

Field width: 20 plots x 3 feet = 60 feet

Field length: 20 plots x 3 feet = 60 feet

References

Erwin LeClerg, Warren Leonard, Andrew Clark (1962). Field Plot Technique, 2nd ed. Page 27.

Alternatively, page 39 in 1939 edition of "Field Plot Technique". https://archive.org/stream/fieldplottechniq00leon

Examples

# NOT RUN {
  
  data(goulden.barley.uniformity)
  dat <- goulden.barley.uniformity

  require(desplot)
  desplot(yield ~ col*row, data=dat,
          aspect=20/20, # true aspect
          main="goulden.barley.uniformity")

  # Left skewed distribution. See LeClerg, Leonard, Clark
  hist(dat$yield, main="goulden.barley.uniformity",
       breaks=c(21,40,59,78,97,116,135,154,173,192,211,230,249)+.5)

# }