agridat (version 1.25)

rau.coffee.uniformity: Uniformity trial of coffee in India

Description

Uniformity trial of coffee in India in 1937

Usage

data("rau.coffee.uniformity")

Format

A data frame with 144 observations on the following 3 variables.

row

row ordinate

col

column ordinate

yield

yield per plot, pounds

Details

An experiment at the Balehonnur Coffee Experiment Station, India. An area about 2 acres in size was selected. The yields are the total of 3 pickings in 1936 and 1937.

Field length: 12 rows * 12 feet = 144 ft (each basic unit is 2 rows of trees, about 6 feet apart)

Field width: 12 column * 30 feet = 360 ft (each basic unit is 5 trees, about 6 feet apart)

Note: Rau does not specify exactly which ordinate of the plots in Table 1 has 2 trees and which ordinate has 5 trees, but given the shape of Table 1 (much wider than tall) and the logical arrangement of data, we believe we have the dimensions correct.

Transcription details: An iPhone was used to capture the text in Table 1, page 82, which was then manually corrected by K.Wright 2025.08.13.

References

None

Examples

if (FALSE) {
library(agridat)
data(rau.coffee.uniformity)
dat <- rau.coffee.uniformity

library(desplot)
desplot(dat, yield~col*row,
        aspect=144/360, # probably true aspect
        flip=TRUE, main="rau.coffee.uniformity")
mean(dat$yield) # matches 27.24 in Rau
}