

   EEccoollooggiiccaall FFaaccttoorrss iinn FFaarrmm MMaannaaggeemmeenntt

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

       Mois: Five levels of soil moisture - level 3 does not
             occur at these 20 farms.

      Manag: Grassland management type (`SF' = standard, `BF' =
             biological, `HF' = hobby farming, `NM' = nature
             conservation).

        Use: Grassland use (`U1' = hay production, `U2' =
             intermediate, `U3' = grazing)

     Manure: Manure usage - classes C0 to C4.

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

        The `farms' data frame has 20 rows and 4 columns. The
        rows are farms on the Dutch island of Terschelling and
        the columns are factors describing the management of
        grassland.

   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::

        J.C. Gower and D.J. Hand (1996) Biplots Chapman  Hall
        Table 4.6.

        Quoted as from: R.H.G. Jongman, C.J.F. ter Braak and
        O.F.R. van Tongeren (1987) Data Analysis in Community
        and Landscape Ecology.  PUDOC, Wageningen

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

        data(farms)
        farms.mca <- mca(farms, abbrev=T)  # Use levels as names
        eqscplot(farms.mca$cs, type="n")
        text(farms.mca$rs, cex=0.7)
        text(farms.mca$cs, labels=dimnames(farms.mca$cs)[[1]], cex=0.7)

