SWSL889

Australian Soil Classification: Bleached-Ferric, ?, Brown CHROMOSOL (confidence level 2).
General Landscape Description: Undulating rises
Site Description: Flat
Land Unit: Macarthur Basalts
Geology: Quaternary basalt

General Land Unit Description: The undulating rises to the west of Macarthur consist of Mottled Brown Chromosols with sporadically bleached subsurface horizons. Black Endohypersodic Vertosols are predominant on the flats which are the prominent landscape element of this unit. Minor shallow Mottled Brown Chromosols occur on slopes and crests also.

Soil Profile Morphology

Surface

A1	0-20 cm	Dark reddish brown (5YR3/3) fine sandy loam, hardsetting surface, pH 5.2. Clear transition to:
A2	20-30 cm	Yellowish red (5YR4/6) fine sandy clay loam, bleached (5YR7/3) when dry, many ferromanganiferous nodules. Sharp transition to:
Subsoil
B21	30-50 cm	Strong brown (7.5YR4/6) medium clay, strong blocky structure (5-10 mm), pH 6.2. Gradual transition to:
B22	50+ cm	Yellowish brown (10YR5/6) medium clay, red mottles (2.5YR4/6), strong blocky structure (5-10 mm), pH 6.4.

Key profile features:

Strongly acidic topsoil
Hardsetting topsoil
Bleached A2 horizon
Many ferromanganiferious nodules in A2 horizon
Mottled subsoil

Soil Profile Characteristics:

-	pH	Salinity
Surface Soil (A1 horizon)	Strongly Acid	Low
Subsoil (B21 Horizon)	Slightly Acid	Very Low

Chemical and Physical Analysis:

Horizon	Horizon Depth (cm)	pH (water)	EC dS/m


A11	0-20	5.2	0.06
A12	20-30
B21	30-50	6.2	0.04
B22	50+	6.4	0.05

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