Uniformity trial of potatoes — kalamkar.potato.uniformity • agridat

Uniformity trial of potatoes at Saskatchewan, Canada, 1929.

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

Source

Kalamkar, R.J. (1932). Experimental Error and the Field-Plot Technique with Potatoes. The Journal of Agricultural Science, 22, 373-385. https://doi.org/10.1017/S0021859600053697

Examples

# \dontrun{

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")
  
# }