kalamkar.potato.uniformity: Uniformity trial of potatoes.

Description Usage Format Details Source Examples

Description

Uniformity trial of potatoes.

Usage

1

Format

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

row

row number, 1-96

col

column number, 1-6

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.

Source

Kalamkar, R.J. (1932). Experimental Error and the Field-Plot Technique with Potatoes. The Journal of Agricultural Science, 22, 373-385.

Examples

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

# True field dimension is 132 foot-long row horizontal, 96*3=288 feet vertical
# Similar to figure 1 of Kalamkar
desplot(yield~col*row, data=dat, main="kalamkar.potato.uniformity",
        flip=TRUE, tick=TRUE, aspect=288/132)

agridat documentation built on May 30, 2017, 5:11 a.m.