farms {MASS}R Documentation

Ecological Factors in Farm Management

Description

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.

Usage

data(farms)

Format

This data frame contains the following columns:

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.

Source

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

Examples

farms.mca <- mca(farms, abbrev = TRUE)  # 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)

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