agridat (version 1.25)

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

Description

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

Usage

data("lehmann.rice.uniformity")

Format

A data frame with 153 observations on the following 5 variables.

year

year

plot

plot (row)

range

range (column)

yield

grain yield (pounds)

total

total crop yield (pounds)

Details

A uniformity experiment of paddy rice on the Experimental Farm at Hebbal (near Bangalore). The plots were the same year-over-year.

The 6th report

P. 2: Plots are 1/10 acre, 50 links wide, 200 links long.

The 7th report

P. 6 table 1 has yield (pounds) of paddy produced on the wet area of the farm for 1905-196. (No total weight weight is given).

The 9th report

P. 19 has commenets. P. 47 tables 6 & 7 has grain/total yield for Range B and Range C 1906-1908.

Field width: 3 plots * 200 links

Field length: 17 plots * 50 links

Transcription details: Data values typed and checked by K.Wright 2024.12.09.

References

Theodor Roemer (1920). Der Feldversuch. Page 68, table 12. https://www.google.com/books/edition/Arbeiten_der_Deutschen_Landwirtschafts_G/7zBSAQAAMAAJ

Examples

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

  libs(desplot)
  dat$year = factor(dat$year)
  desplot(dat, yield ~ range*plot|year,
          aspect=(17*50)/(2*200),
          main="lehmann.rice.uniformity",
          flip=TRUE, tick=TRUE)
  desplot(dat, total ~ range*plot|year,
          aspect=(17*50)/(2*200),
          main="lehmann.rice.uniformity",
          flip=TRUE, tick=TRUE)
  
  # libs(dplyr)
  # group_by(dat, year) 
}