agridat (version 1.23)

li.millet.uniformity: Uniformity trial of millet

Description

Uniformity trial of millet at China in 1934.

Format

A data frame with 600 observations on the following 3 variables.

row

row

col

column

yield

yield (grams)

Details

Crop date estimated to be 1934.

Field was 100 ft x 100 ft. Plots were 15 feet long by 1 foot wide.

Field width: 100 plots * 1 foot = 100 feet

Field length: 6 plots * 15 feet = 100 feet

Li found the most efficient use of land was obtained with plats 15 feet long and two rowss wide. Also satisfactory would be one row 30 feet long.

Examples

if (FALSE) {

library(agridat)
  
  data(li.millet.uniformity)
  dat <- li.millet.uniformity

  mean(dat$yield) # matches Li et al.
  
  libs(desplot)
  desplot(dat, yield~col*row,
          aspect=100/100, # true aspect
          main="li.millet.uniformity")
  
}