agridat (version 1.12)

lyon.potato.uniformity: Uniformity trial of potatoes

Description

Uniformity trial of potatoes

Format

A data frame with 204 observations on the following 3 variables.

row

Row, numeric

section

Section, numeric

yield

Yield, in pounds

Details

In 1909, potatoes were harvested from uniform land. There were 34 rows, 34 inches apart. Each row was harvested in 6 sections, each being 72 feet, 7 inches long.

References

Harris, J.A. (1920). Practical universality of field heterogeneity as a factor influencing plot yields. Journal of Agricultural Research, 19, 279-314. http://books.google.com/books?id=jyEXAAAAYAAJ&pg=PA279

Examples

# NOT RUN {
data(lyon.potato.uniformity)
dat <- lyon.potato.uniformity

desplot(yield ~ row*section, dat, tick=TRUE,
        main="lyon.potato.uniformity")

# }