WLRA140

Gully erosion of higher slopes		Site Code	WLRA140	Mottled, Magnesic, Brown CHROMOSOL
		Location	Ararat-St Arnaud Road, Joel South, western Victoria
		Landform	Hill
		Geology	Palaeozoic (Cambrian) Warrak Formation: marine sandstone, siltstone, schist
		Element	Hillslope
		Slope	15%
		Aspect	West


Horizon	Depth (cm)	Description
A1	0–15	Strong brown (7.5YR4/6); loam, fine sandy; apedal (structureless); firm dry consistence; many small to medium angular quartz and angular platy weakly metamorphosed siltstone; few fine and very fine roots; pH 5.4; clear and smooth boundary to:
B2	15–35	Light olive brown (2.5Y5/4) with many medium distinct red (2.5YR4/6) inclusions of substrate material as mottles; silty clay loam; moderate fine to medium subangular blocky structure; smooth ped-fabric; very firm dry consistence; many small to medium angular quartz and angular platy weakly metamorphosed siltstone; few fine and very fine roots; pH 5.9; clear irregular boundary to:
C	35–75+	Weathered weakly metamorphosed siltstone; field pH 7.0.
Management Considerations
Shallow texture contrast profile, slightly acidic. Shallow clayey magnesic subsoil, not sodic, overlying weathered sediments (variable depth?). Slightly dispersive. Nutrient status of subsoil is high per clay percentage but magnesium is dominant. Red mottling, drainage slightly impeded. Landscape position, lower and mid slope, highly susceptible to sheet and gully erosion.

Horizon	Depth (cm)	pH (water)	pH (CaCl₂)	EC dS/m	Exch. Al mg/kg	Exchangeable Cations cmol-/kg				Field Capacity (pF2.5)	Wilting Point (pF4.2)	Coarse Sand %	Fine Sand %	Silt %	Clay %
Horizon	Depth (cm)	pH (water)	pH (CaCl₂)	EC dS/m	Exch. Al mg/kg	Ca	Mg	K	Na	Field Capacity (pF2.5)	Wilting Point (pF4.2)	Coarse Sand %	Fine Sand %	Silt %	Clay %
A1	0–15	5.4	4.5	<0.05	56	1.4	1	0.46	0.11	25.3	6.3	19.8	45.6	18.5	12
B2	15–35	5.9	4.9	0.06	24	0.46	11	0.6	0.45	33.3	17.9	5	26.3	23	41.5

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