goulden.barley.uniformity {agridat} | R Documentation

## 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

### 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

    ## 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)

    ## End(Not run)

[Package agridat version 1.16 Index]