SW90

Landscape view from SW90 showing low hills		Site Code	SW90	Calcic, Mottled-Mesonatric, Black SODOSOL
		Location	Mount Pollock Road, 1 km south of Mount Pollock
		Landform	Low hill associated with Mt Pollock
		Geology	Quaternary Volcanics: basalt
		Element	Simple slope
		Slope	5%
		Aspect	East
Horizon	Depth (cm)	Description
A1	0-15	Very dark grey (10YR3/1 moist); fine sandy loam; pH 5.5; clear boundary to:
A2	15-25	Dark greyish brown (10YR4/2 moist), light brownish grey (10YR6/2 dry); fine sandy loam; weakly pedal; common (~20%), fine (<8 mm) buckshot; pH 6.2; sharp (thin discontinuous bleached contact) boundary to:
B21t	25-60/70	Very dark grey (10YR3/1 moist); heavy clay; few (<10%), small, yellowish brown (10YR5/8 moist) mottles; very coarse (200 mm) prismatic to columnar (200 mm), parting to coarse prismatic and coarse blocky (20-50 mm) structure; strong consistence; pH 6.6; abrupt boundary to:
B22g	60/70 +	Dark greyish brown (10YR4/2 moist) with common (~20%), diffuse, yellowish brown (10YR5/4-5/6 moist) mottles; heavy clay; apedal, massive; buckshot (10-20%); large irregular rounded basalt boulders (>60 cm) at unusual angles (possibly colluvial).
Management considerations
Strong texture contrast between surface (A) horizons and subsoil (B21) horizon can result in waterlogging. This is aggravated in this soil by the very coarse prismatic to columnar structure in upper subsoil which is highly sodic and dispersive.

Analytical data

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