Series D

Soils included in this series have distinct texture contrasts between hard setting surface soil horizons and moderately to strongly pedal clayey subsoils. Sporadically bleached A2 horizons are present. The uppermost subsoil layer, that is at least 15 cm thick is mottled and dominantly yellow to yellow-grey. The soil reaction trend is alkaline.

In the present survey, this series consists of one soil type:

Type D

Profile Morphology:

Surface Soil - A1 horizon

15-20 cm thick.
Dark brown to dark greyish brown; often stained with some rusty colours along the fine root channels.
Sandy clay loam.

Surface Soil - A2 horizon

2-3 cm thick.
Brown to yellowish brown, sporadically bleached.
Sandy loam to sandy clay loam.
This horizon often occurs only as nests of sporadic bleaching at the interface between the A and B horizons.

Subsoil

Mottled grey, grey-brown and/or yellowish brown.
Medium to heavy clay.

Soil Inclusions

Trace to slight amounts of soft and/or hard CaCO3 usually occur at about 100 cm.

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	7.1	0.022	*	8.3	16.6
B	7.7	0.105	0.073	25.9	38.6
C	8.5	0.206	0.135	28.3	44.1

* Sodium Chloride contents were not measured and are expected to be very low (based on TSS <0.05%).

Occurrence:

Type D occurs mainly in the flood plains.

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