kalamkar.potato.uniformity: Uniformity trial of potatoes

Description Usage Format Details Source Examples

Description

Uniformity trial of potatoes at Saskatchewan, Canada, 1929.

Usage

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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. http://doi.org/10.1017/S0021859600053697

Examples

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## Not run: 
  
  data(kalamkar.potato.uniformity)
  dat <- kalamkar.potato.uniformity

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

## End(Not run)

agridat documentation built on July 12, 2018, 1:04 a.m.