Yields from a Barley Field Trial

SUMMARY:

The immer data frame has 30 rows and 4 columns. Five varieties of barley were grown in six locations in each of 1931 and 1932.

DATA DESCRIPTION:

This data frame contains the following columns:

ARGUMENTS:

Loc
The location.
Var
The variety of barley ( "manchuria", "svansota", "velvet", "trebi" and "peatland").
Y1
Yield in 1931
Y2
Yield in 1932

SOURCE:

Immer, F.R., Hayes, H.D. and LeRoy Powers (1934) Statistical determination of barley varietal adaptation. Journal of the American Society for Agronomy 26, 403-419.

Fisher, R.A. (1947) The Design of Experiments. 4th edition. Edinburgh: Oliver and Boyd.

EXAMPLES:

immer.aov <- aov(cbind(Y1,Y2) ~ Loc + Var, data = immer)
summary(immer.aov)
immer.aov <- aov((Y1+Y2)/2 ~ Var + Loc, data = immer)
summary(immer.aov)
model.tables(immer.aov, type = "means", se = T, cterms = "Var")
multicomp(immer.aov, plot = T)