gilgais {MASS}R Documentation

Line Transect of Soil in Gilgai Territory

Description

This dataset was collected on a line transect survey in gilgai territory in New South Wales, Australia. Gilgais are natural gentle depressions in otherwise flat land, and sometimes seem to be regularly distributed. The data collection was stimulated by the question: are these patterns reflected in soil properties? At each of 365 sampling locations on a linear grid of 4 meters spacing, samples were taken at depths 0-10 cm, 30-40 cm and 80-90 cm below the surface. pH, electrical conductivity and chloride content were measured on a 1:5 soil:water extract from each sample.

Usage

gilgais

Format

This data frame contains the following columns:

pH00
pH at depth 0-10cm
pH30
pH at depth 30-40cm
pH80
pH at depth 80-90cm
e00
electrical conductivity in mS/cm (0-10 cm)
e30
electrical conductivity in mS/cm (30-40 cm)
e80
electrical conductivity in mS/cm (80-90 cm)
c00
chloride content in ppm (0-10 cm)
c30
chloride content in ppm (30-40 cm)
c80
chloride content in ppm (80-90 cm)

Source

Webster, R. (1977) Spectral analysis of gilgai soil. Australian Journal of Soil Research 15, 191–204.

Laslett, G. M. (1989) Kriging and splines: An empirical comparison of their predictive performance in some applications (with discussion). Journal of the American Statistical Association 89, 319–409

References

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.


[Package MASS version 7.2-33 Index]