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Series K

The soil series is characterised by having a conspicuously bleached A2 ‘subsurface' horizon, followed by dark grey to greyish or reddish brown subsoil. In the present survey, this series consists of one soil type:

Type K

Profile Morphology:

Surface Soil - A1 horizon

  • 5-10 cm thick.
  • Very dark grey to grey brown.
  • Medium to heavy clay, occasionally slightly sandy.
  • Moderately friable to non-friable.

Surface Soil - A2 horizon
  • 3-15 cm thick.
  • Dark grey to greyish brown (when moist), conspicuously bleached near white (when dry).
  • Sandy clay loam to clay loam or light clay
  • Structureless, massive (ie. apedal).
  • Slightly friable to moderately friable.

Subsoil
  • Very dark greyish brown to reddish brown, becoming gradually lighter with depth. Colour mottling may occur (or increase) at about 50-70 cm.
  • Heavy clay.
  • Moderately friable to non-friable. However, friability may increase in the deep subsoils.
  • Trace to slight amounts of soft and/or hard CaCO3.

Analytical Data for Selected Depths Down the Profile:

Depth
pH
Total Soluble Salts
Sodium Chloride
Moisture Retention @ 15-Bar
Moisture Retention @ 1/3-Bar
-
-
%
%
%
%
A
7.8
0.194
0.134
16.2
27.9
B
8.8
0.110
0.037
26.7
45.0
C
9.1
0.335
0.120
27.1
48.2

Occurrence:

Type K occurs mainly in lake-beds, drainage lines and extensive depressions. It also occurs in some gilgai depressions in the gently undulating gilgaied plains.
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