

   YYiieellddss ffrroomm aa BBaarrlleeyy FFiieelldd TTrriiaall

   AArrgguummeennttss::

        Loc: The location.

        Var: The variety of barley (`"manchuria"', `"svan-
             sota"', `"velvet"', `"trebi"' and `"peatland"').

         Y1: Yield in 1931

         Y2: Yield in 1932

   SSUUMMMMAARRYY::

        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.

   DDAATTAA DDEESSCCRRIIPPTTIIOONN::

        This data frame contains the following columns:

   SSOOUURRCCEE::

        Immer, F.R., Hayes, H.D. and LeRoy Powers (1934) Sta-
        tistical determination of barley varietal adaptation.
        Journal of the American Society for Agronomy 26,
        403-407.

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

   EExxaammpplleess::

        ### Not usable in R
        Y <- cbind(Y1,Y2)
        immer.aov <- aov(Y ~ Loc + Var, data=immer)
        summary(immer.aov)

