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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