ALRA069

Plains near Barton		Site Code	ALRA069
		Location	Morass Road, Barton
		Landform	Gently undulating plain
		Geology	Quaternary Newer Volcanics: extrusive tholeitic to alkaline basalt, scoria and ash
		Element	Plain
		Slope	1%
		Aspect	West
Horizon	Depth (cm)
A1	0–15	Dark brown (7.5YR3/2); clay loam; strong very fine subangular blocky structure; rough fabric; weak consistence when moderately moist; pH 5.5; gradual and smooth boundary to:		Vertic (& Ferric), Mottled-Hypernatric, Brown SODOSOL
A21	15–30	Greyish brown(10YR5/2); sporadically bleached light grey (10YR7/2 moist); clay loam; massive (structureless); firm consistence when dry; pH 6.0; abrupt and wavy boundary to:
A22	30–40	Greyish brown (10YR5/2); sporadically bleached light grey (10YR7/2 moist); common fine distinct strong brown (7.5YR5/6) mottles; clay loam; weak medium size subangular blocky structure; rough fabric; strong consistence when dry; many fine and medium ferromanganiferous nodules; pH 6.5; clear and wavy boundary to:
B21	40–70	Light olive brown (2.5Y5/6) with common fine faint greyish brown (2.5Y5/2) and fine strong brown (7.5YR5/6) mottles; medium heavy clay; moderate coarse polyhedral structure; few medium manganiferous concretions; smooth fabric; few distinct slickensides; very firm consistence when moderately moist; pH 7.0; gradual and wavy boundary to:
B22	70–110+	Light olive brown (2.5Y5/4); medium heavy clay; moderate medium and coarse prismatic structure; smooth fabric; few distinct slickensides; very firm consistance when moderately moist; pH 7.0.
Management Considerations:
Site exhibits a number of gilgais of mostly normal type with some possible linear type gilgai occurring, indication of vertic subsoil Abundance of roots in the acidic topsoil Strongly dispersive intermittent A22 horizon Wavy boundary between A and B horizon due to gilgai nature of the soil profile Strong texture contrast soil with variable depth to subsoil (variable plant water availability) Prominent cracking in the B22 horizon Strongly sodic neutral subsoil which is dispersive, also with an elevated magnesium level compared to A horizon (>12 cmol_c/kg). Higher concentrations of soluble salts in vertic subsoil

Chemical Analysis:

Horizon	Depth (cm)	pH (water)	pH (CaCl₂)	EC dS/m	Exchangeable Aluminium 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	Organic Carbon %	Ca	Mg	K	Na	Field Capacity (pF2.5)	Wilting Point (pF4.2)	Coarse Sand %	Fine Sand %	Silt %	Clay %
A1	0-15	5.5	4.9	0.1	<10	3.0	3.4	1.7	0.27	0.51	27.7	7.2	9.4	48.7	21.0	12.5
A21	15-30	6.0	5.4	0.08	<10		1.7	0.68	0.05	0.37	23.9	2.7	9.7	58.1	23.5	6.0
A22	30-40	7.3	6.6	0.13	<10		1.8	2.8	0.1	1.2	19.7	7.3	17.1	47.2	17.5	14.0
B21	40-70	7.4	6.9	0.55			3.6	12	0.2	5.6	46.6	24.3	7.9	19.0	9.5	60.5
B22	70-110+	7.1	6.7	1.0			2.9	15	0.2	7.5	48.2	23.6	3.9	16.2	15.0	59.0

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