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

Source

C. H. Goulden, (1939). Methods of statistical analysis, 1st ed. Page 18. https://archive.org/stream/methodsofstatist031744mbp

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

# \dontrun{

library(agridat)
data(goulden.barley.uniformity)
dat <- goulden.barley.uniformity

libs(desplot)
desplot(dat, yield ~ col*row,
        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)

# }