

   LLiinnee TTrraannsseecctt ooff SSooiill iinn GGiillggaaii TTeerrrriittoorryy

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

       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)

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

        This dataset was collected on a line transect survey in
        gilgai territory in New South Wales, Australia.  Gil-
        gais 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 conduc-
        tivity and chloride content were measured on a 1:5
        soil:water extract from each sample.

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

        This data frame contains the following columns:

   RReeffeerreenncceess::

        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 Ameri-
        can Statistical Association, 89, 319-409

