ALRA081

Overlooking alluvial plains of Mt William Creek		Site Code	ALRA081
		Location	Jallukar Hills, Jallukar
		Landform	Rolling hills
		Geology	Cambrian volcanics
		Element	Hillslope
		Slope	12%
		Aspect	West
Horizon	Depth (cm)
A1	0–10	Very dark greyish brown (10YR3/2); sandy loam; very fine moderate subangular blocky structure; rough-ped fabric; weak to very weak consistence when dry; water repellent; common fine to medium angular/subangular/subrounded metamorphic; sedimentary and quartz coarse fragments; pH 5.5; clear and smooth boundary to:
A2	10–20	Brown (7.5YR4/4); sporadically bleached (10YR8/2); clayey sand (coarse sandy); massive structure; rough-ped fabric; weak consistence when dry; many (50%) fine to medium gravelly subangular and subrounded metamorphic and sedimentary coarse fragments; pH 6.5; abrupt and wavy boundary to:
B2	20–60	Yellowish red (5YR4/6) with common medium distinct light olive brown (2.5Y5/4) mottles; medium heavy clay; moderate medium to coarse angular blocky structure; rough and smooth-ped fabric; very firm consistence when moderately moist; few fine to medium gravelly angular; subangular and subrounded metamorphic and sedimentary coarse fragments; pH 8.0; diffuse and irregular boundary to:
B3	60–70	Yellowish red (5YR4/6); medium clay; strong fine angular blocky structure; smooth-ped fabric; firm consistence when moderately moist; many (50%) fine medium to coarse angular; subangular and subrounded metamorphic and sedimentary coarse fragments; pH 8.0; sharp and irregular boundary to:
C	70+	Consolidated bedrock.
Management Considerations:
Soil depth is relatively shallow with many coarse fragments throughout. Sloping terrain and shallow depth to bedrock leads to high runoff and sheet erosion potential. Shallow loam and sandy topsoils. Strong texture contrast soil with strong hard bleach on contact with subsoil. Acidic surface with neutral to alkaline trend with depth. Differential soil water movement likely (subsurface drainage) Mottling indicating some restrictive drainage in subsoil. Moderate to susceptibility to compaction (relatively shallow topsoil and clayey subsoil). Very slight dispersion in topsoil but very highly dispersive in subsoil.

Chemical Analysis:

Horizon	Depth (cm)	pH (water)	pH (CaCl₂)	EC dS/m	Exchangeable Aluminium cmol-/kg	NaCl %	Exchangeable Acidity cmol-/kg	Organic Carbon %	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	Exchangeable Aluminium cmol-/kg	NaCl %	Exchangeable Acidity cmol-/kg	Organic Carbon %	Ca	Mg	K	Na	Field Capacity (pF2.5)	Wilting Point (pF4.2)	Coarse Sand %	Fine Sand %	Silt %	Clay %
A1	0–10	5.5	4.9	0.25	<10		9.1	3.6	3.5	1.4	1.2	0.79	20.8	8.0	21.9	45.1	13.5	9.5
A2	10–20	6.9	6.5	0.09			2.9		2.3	1.2	0.49	0.44	16.5	9.1	24.6	48.0	15.0	7.0
B2	20–60	7.5	6.7	0.27		0.04			5.4	14.0	0.9	3.4	37.5	19.8	9.7	25.8	11.5	51.5
B3	60–70	7.7	6.9	0.4		0.06			4.5	11.0	0.7	4.3	32.9	16.1

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