eden.tea.uniformity {agridat} | R Documentation |

##
Uniformity trial of tea

### Description

Uniformity trial of tea in Ceylon.

### Usage

data("eden.tea.uniformity")

### Format

A data frame with 144 observations on the following 4 variables.

`entry`

entry number

`yield`

yield

`row`

row

`col`

column

### Details

Tea plucking in Ceylon extended from 20 Apr 1928 to 10 Dec 1929. There were 42 pluckings.

The field was divided into 144 plots of 1/72 acre = 605 sq ft.
Each plot contained 6 rows of bushes, approximately 42 bushes. (Each row was thus about 7 bushes).

Plots in row 12 were at high on a hillside, plots in row 1 were low on the hill.

Note: We will assume the plots are roughly square: 6 rows of 7 bushes.

Field width: 12 plots * 24.6 feet = 295 feet

Field length: 12 plots * 24.6 feet = 295 feet

### Source

T. Eden. (1931).
Studies in the yield of tea. 1. The experimental errors of field
experiments with tea.
Agricultural Science, 21, 547-573.
https://doi.org/10.1017/S0021859600088511

### References

None

### Examples

## Not run:
library(agridat)
data(eden.tea.uniformity)
dat <- eden.tea.uniformity
# sum(dat$yield) # 140050.6 matches total yield in appendix A
# mean(dat$yield) # 972.574 match page 5554
m1 <- aov(yield ~ factor(entry) + factor(row) + factor(col), data=dat)
summary(m1)
libs(desplot)
desplot(dat, yield ~ col*row,
aspect=1,
main="eden.tea.uniformity")
## End(Not run)

[Package

*agridat* version 1.18

Index]