agridat (version 1.23)

ducker.groundnut.uniformity: Uniformity trial of groundnut.

Description

Uniformity trial of groundnut.

Usage

data("ducker.groundnut.uniformity")

Format

A data frame with 215 observations on the following 3 variables.

row

row ordinate

col

column ordinate

yield

yield, pounds per plot

Details

The experiment was grown in Nyasaland, Cotton Experiment Station, Domira Bay, 1942-43. There were 44x5 identical plots, each 1/220 acre in area. Single ridge plots each one chain in length, and one yard apart. Two rows of groundnuts are planted per ridge, staggered at 1 foot between holes. Holes are spaced 18 inches x 12 inches. Two seeds are planted per hole.

The yield values are pounds of nuts in shell.

Field length: 5 plots, 22 yards each = 110 yards.

Field width: 44 plots, 1 yard each = 44 yards.

This data was made available with special help from the staff at Rothamsted Research Library.

Data typed by K.Wright and checked by hand.

References

None

Examples

if (FALSE) {
  library(agridat)
  data(ducker.groundnut.uniformity)
  dat <- ducker.groundnut.uniformity
  libs(desplot)
  desplot(dat, yield ~ col*row,
          flip=TRUE, aspect=110/44,
          main="ducker.groundnut.uniformity")
}