Uniformity trial of brassica.

Uniformity trial of brassica in India.

Usage

data("khan.brassica.uniformity")

Format

A data frame with 648 observations on the following 4 variables.

field

Field, F1 or F2

row

row ordinate

col

column ordinate

yield

yield, 1/8 ounce

Details

Two different fields were used, representing the average type of soil at Lyallpur. An area of 90 ft by 90 ft was marked out and harvested as individual plots 5 feet per side.

This data was copied from a pdf and hand-corrected.

Source

Khan, Abdur Rashid and Jage Ram Dalal (1943). Optimum Size and Shape of Plots for Brassica Experiments in the Punjab. Sankhyā: The Indian Journal of Statistics ,6, 3. Proceedings of the Indian Statistical Conference 1942 (1943), pp. 317-320. https://www.jstor.org/stable/25047782

References

None.

Examples

if (FALSE) { # \dontrun{
  library(agridat)
  data(khan.brassica.uniformity)
  dat <- khan.brassica.uniformity

  # Slightly different results than Khan Table 1.
  ## dat 
  ##   mutate(yield=yield/8) 
  ##   group_by(field) 
  ##   summarize(mn=mean(yield), sd=sd(yield))

  libs(desplot)
  desplot(dat, yield ~ col*row | field,
          flip=TRUE, aspect=1,
          main="khan.brassica.uniformity")

} # }