agridat (version 1.23)

lehmann.millet.uniformity: Uniformity trial of millet in India

Description

Uniformity trial of millet in India, 3 years on same land.

Usage

data("lehmann.millet.uniformity")

Format

A data frame with 396 observations on the following 5 variables.

year

year

plot

plot (row)

range

range (column)

yield

grain yield (pounds)

total

total crop yield (pounds)

Details

Experiment farm near Bangalore. The plots are 1/10 acre, each 50 links wide and 200 links long. [6th report, p. 2]. The middle part of the field is occupied by buildings.

The 6th report: Map (only partially scanned in the pdf). "A part of the dry lands nearest the tank, which is not quite as uniform as the remainder, is already excluded from the experimental ground proper".

The 7th report: P. 12 has grain/straw yield for 1905.

The 9th report: P. 1-10 has comments. P. 36-39 have data: Table 1 has grain yield, table 2 total yield of grain and straw. Columns are, left-right, A-F. Rows are, top-bottom, 1-22.

The season of 1906 was abnormally wet compared with 1905 and 1907. [9th report]

Field width: 6 plots * 200 links

Field length: 22 plots * 50 links

References

None

Examples

if (FALSE) {
  
  library(agridat)
  data(lehmann.millet.uniformity)
  dat <- lehmann.millet.uniformity

  libs(desplot)
  dat$year = factor(dat$year)
  desplot(dat, yield ~ range*plot|year,
          aspect=(22*50)/(6*200),
          main="lehmann.millet.uniformity",
          flip=TRUE, tick=TRUE)
  desplot(dat, total ~ range*plot|year,
          aspect=(22*50)/(6*200),
          main="lehmann.millet.uniformity",
          flip=TRUE, tick=TRUE)
  
  # libs(dplyr)
  # group_by(dat, year) 
}