agridat (version 1.23)

kalamkar.potato.uniformity: Uniformity trial of potatoes

Description

Uniformity trial of potatoes at Saskatchewan, Canada, 1929.

Usage

data("kalamkar.potato.uniformity")

Format

A data frame with 576 observations on the following 3 variables.

row

row

col

column

yield

yield of potatoes per plot

Details

The data is for potato yields in 96 rows, each 132 feet long, with 3 feet between rows.

Each row was harvested as six plots, each 22 feet long. Each hill had one seed piece. Hills were spaced 2 feet apart in each row.

Field width: 6 plots * 22 feet = 132 feet

Field length: 96 rows * 3 feet = 288 feet

Units of yield are not given, but might appear in the paper by Kirk (no access).

References

Kirk, L. E. (1929) Field plot technique with potatoes with special reference to the Latin square. Scientific Agriculture, 9, 719. https://doi.org/10.4141/sa-1929-0067

Examples

if (FALSE) {

library(agridat)
data(kalamkar.potato.uniformity)
dat <- kalamkar.potato.uniformity

# Similar to figure 1 of Kalamkar
libs(desplot)
desplot(dat, yield~col*row,
        flip=TRUE, tick=TRUE, aspect=288/132, # true aspect
        main="kalamkar.potato.uniformity")
  
}