Victorian Resources Online (archived)

SFS9a

Location: Woodhouse

Australian Soil Classification: Vertic (& Ferric), Mottled-Subnatric, Grey SODOSOL

Northcote Factual Key: Dy3.42

General Landscape Description: Level plain within the Victorian volcanic plains. Flat, gently sloping on the side of broad depression.
Site Description: Depression or 'hollow' component of gilgai micro-relief.
Land Use: Raised beds with canola.

SFS9a Landscape

Soil Profile Morphology:

Surface Soil			SFS9a Profile
A1	0-8/10 cm	Dark greyish brown (10YR4/2) with rusty root channel mottling; loam; apedal; weak consistence dry; pH 5; clear and wavy change to:
A2	8/10-60 cm	Brown (10YR5/3) with conspicuous bleach (10YR6/2d) and yellow mottles; clay loam, fine sandy; lower part of horizon (40-60 cm depth) has abundant (~90%) buckshot; pH 5.8; clear and abrupt change to:
Subsoil
B21tc	60-100 cm	Dark grey (10YR4/1) with common brownish yellow (10YR6/8) and dark red (2.5YR4/8) mottles; heavy clay; common (10-20%) buckshot; friable in a moist condition; fine polyhedral and lenticular structure; pH 7.0; gradual change to:
B22	100+ cm	Dark grey (10YR4/1) with many brownish yellow (10YR6/8) mottles and very few dark red (2.5YR4/8) mottles disappearing at depth; medium heavy clay; fine polyhedral and lenticular structure; pH 6.8.

Key Profile Features:

Strong texture contrast between surface (A) horizon and subsoil (B21) horizon.
Conspicuously bleached subsurface (A2) horizon.
Buckshot in A2 is only in lower 10cm of horizon.

Soil Profile Characteristics:

	pH	Salinity Rating	Sodicity	Dispersion
Surface (A1 horizon)	Strongly Acid	Low	Non-Sodic	None
Subsoil (B21 horizon)	Neutral	Very Low	Sodic	None¹
Deeper Subsoil (B22 horizon)	Slightly Acid	Low	Sodic	None

^1. Strong-complete dispersion after remoulding.

Horizon	Horizon Depth (cm)	pH (water)	pH (CaCl₂)	EC dS/m	Organic Carbon %	Nitrogen %	Exchangeable Cations
							Ca	Mg	K	Na
							meq/100g
A1	0-8/10	5	4.4	0.15	4.3	0.36	4.2	1.6	0.22	0.35
A2	15-30	5.8	4.9	0.06			3.2	1.4	0.08	0.25
B21k	65-85	7	7	0.13			4	9.1	0.25	2.2
B22	100+	6.8	6.5	0.21			4.5	11	0.27	3.3

Horizon	Horizon Depth (cm)	Exchangeable Aluminium mg/kg	Exchangeable Acidity meq/100g	Field Capacity pF2.5	Wilting Point pF4.2	Coarse Sand (0.2-2.0 mm)	Fine Sand (0.02-0.2 mm)	Silt (0.002-0.02 mm)	Clay (<0.002 mm)


A1	0-8/10	37	14	34.6	12.1	5	39	28	20
A2	15-30	<10	6.7	30.1	7.6	3	43	32	19
B21k	65-85		12	40.7	26.7	9	12	8	67
B22	100+		11	45.4	29.8	3	10	8	76

Management Considerations:

Whole Profile

Plant available water capacity (PAWC) is considered to be medium (estimated at 107 mm) in the upper 100 cm of this soil profile.

Notes

This site had more earthworms than has been seen at any other SFS site.

Profile Described By: Richard MacEwan (May 1999).

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