kalamkar.potato.uniformity {agridat} | R Documentation

## 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

### 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

    ## 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)

[Package agridat version 1.16 Index]