Victorian Resources Online (archived)

LP44

Property: State Forest	Geo. Ref: 701955E, 5909000N; ST ARNAUD
*Aust. Soil Class*.: Bleached, Magnesic, Red KUROSOL	Northcote Factual Key: Dr 3.41
*Great Soil Group:* red soloth	Geology: Cambrian sediments.
General Landscape Description: Mid to upper slope (slope 20%) on mountain ridge located approximately 5 km east of Barkly. Vegetation includes Grey Box (E. microcarpa) and Red Stringybark (E. macrorhyncha).

Soil Site LP 44 Landscape

Soil Profile Morphology

Surface Soil

A1	0-10 cm	Brown (7.5YR4/2); fine sandy loam; weak medium blocky structure; firm consistence dry; pH 5.0:	Soil Site LP44 Profile
A2	10-20 cm	Yellowish brown (10YR5/4) conspicuously bleached; fine sandy clay loam; structureless; contains very many (50%) angular quartz fragments; pH 5.1:
Subsoil
B1	20-30 cm	Yellowish red (5YR5/8) and reddish yellow (5YR6/6); light medium clay; moderate medium to coarse polyhedral structure; strong consistence dry; pH 5.4:
B21	30-60 cm	Dark red (2.5YR4/8); medium clay; strong medium to fine blocky structure; strong consistence dry; quartz floaters occur throughout; pH 5.4:
B22	60-90 cm	Dark red (2.5YR4/8) and brownish yellow (10YR6/6); medium clay; strong medium to fine blocky structure; strong consistence dry; pH 5.6:
C	90 cm +	Weathered siltstone.

Key Profile Features

Strong texture contrast between surface (A) horizons and subsoil (B21) horizon.

Key Profile Characteristics

	pH	Salinity Rating	Sodicity	Dispersion
Surface (A1 horizon)	strongly acid	very low	non-sodic	none
Subsoil (30 - 60 cm)	strongly acid	very low	non-sodic	none
Deeper subsoil (60 - 90 cm)

Horizon	Horizon Depth	pH (water)	pH CaCl2	EC 1:5	NaCl	Exchangeable Cations
						Ca	Mg	K	Na
						Meq/100g
A1	0-10	5	4.2	0.07		4.4	1.9	0.6	0.1
A2	10-20	5.1	4	<0.05		0.1	0.5	0.2	0.1
B1	20-30	5.4	4.2	<0.05		0.1	2	0.4	0.1
B21	30-60	5.4	4.2	<0.05		0.1	4	0.5	0.2
B22	60-90	5.6	4.3	<0.05		<0.1	4.6	0.4	0.3
C	90

Horizon	Horizon Depth	Ex Al mg/kg	Ex Ac meq/100g	Field pF2.5	Wilting Point pF4.2	Coarse Sand (0.2-2.0mm)	Fine Sand (0.02-0.2mm)	Silt (0.002-0.02mm)	Clay (<0.002mm)


A1	0-10	87	23.2
A2	10-20	159	9.4
B1	20-30	187	11.2
B21	30-60	304	15.6
B22	60-90
C	90

Management Considerations:
Whole Profile

Exchangeable aluminium levels are high throughout the strongly acid soil profile (increasing with depth). These levels will significantly restrict the growth of aluminium-sensitive plant species.

Surface (A) Horizons

The surface horizons have a low inherent fertility (based on the sum of the exchangeable basic cations).

Subsoil (B) Horizons

Exchangeable magnesium levels are high (ie. greater than 80% of total cations) throughout the subsoil. This may result in nutrient imbalances (e.g. calcium and potassium deficiency).

Notes:

Profile described by Mark Imhof, Paul Rampant and Karen De Plater (23/3/95).

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