Graeco-Latin experiment with maize

Usage

data("onyiah.maize")

Format

A data frame with 20 observations on the following 5 variables.

loc: location
gen: maize genotype
greek: spacing
latin: fertilizer level
yield: yield per hectare

Details

In a multi-location variety trial of maize, there were two additional treatment factors: spacing (greek) and fertilizer (Latin).

Data provenance: Typed by K.Wright.

Source

Leonard C. Onyiah (2008). Design and Analysis of Experiments: Classical and Regression Approaches with SAS. https://books.google.com/books?id=_P3LBQAAQBAJ&pg=PA334

References

None

Examples

if (FALSE) { # \dontrun{
  library(agridat)
  data(onyiah.maize)
  dat <- onyiah.maize
  
  # anova
  dat <- transform(dat, loc=factor(loc), gen=factor(gen),
                   greek=factor(greek), latin=factor(latin))
  m1 <- aov(yield ~ loc + gen + greek + latin, data=dat)
  anova(m1)
  
} # }