Type A

Type A is a soil type found over small areas on the higher parts of the plain. It is externally well drained. The top 750 cm of the profile appears to have atleast moderate internal drainage.

It has been mapped individually and in association with Type D, as well as with the normal and brown phases of Rutherglen Loam (see UNIT 1).

Example of a landscape in the Type A mapping unit.

Typical Profile

Surface
A	0-22 cm	Loam, 12 to 37 cm thick; differentiated in the thicker horizons into a dark greyish brown (7.5YR5/4) or grey-brown A horizon, and a brown to dull yellowish brown (7.5YR6/6) weakly to moderately bleached subsurface (A2) horizon; usually sharply separated from:
Subsoil
B21	22-50 cm	Red-brown (5YR5/6 to 2.5YR5/8) clay; friable when moist; light buckshot irregularly present; grading into:
B22	50-75 cm	Variously mottled red-brown, brown, brownish yellow and grey friable clay; at depths varying from 67 to 85 cm sharply separated from:
B23	75-120 cm	Mainly grey and brown mottled, dense clay; scattered black inclusions; parting into small peds when moist; trace of calcium carbonate; light grey pockets up to 10 cm across irregularly present at the boundary with the horizon above.

Soil Pit Site NE38 is an example of a soil that occurs in the Type A mapping unit.

Variations

Soils with red mottled B horizons have been included in the type.

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