H73

Location: Bostocks Creek

Australian Soil Classification: Black CHROMOSOL

General Landscape Description: Plain
Site Description: Lower slope of gentle slope (1%), near drainage line
Vegetation: Pasture
Geology: Quaternary Basalt, Colluvium

H72 Landscape

Soil Profile Morphology:

Surface Soil

A11	0-15 cm	Very dark grey (7.5YR3/1); light clay loam, fine sandy; strong medium parting to fine subangular blocky structure; rough ped fabric; firm consistence, slightly moist; pH 5.0; clear change to:	H73 Profile
A12	15-25 cm	Dark greyish brown (10YR3/2); loam fine sandy; moderate medium parting to fine subangular blocky structure; rough ped fabric; firm consistence, slightly moist; many medium ferruginous concretions; pH 5.0; clear change to:
A2	25-40 cm	Dark greyish brown (10YR4/2); sporadic light grey (10YR7/2) bleach; many medium distinct yellowish brown (10YR5/8) mottles; heavy loam fine sandy; weak medium polyhedral structure; rough ped fabric; weak consistence, slightly moist; pH 5.2; abrupt change to:
Subsoil
B21	40-65 cm	Very dark grey (10YR3/1); heavy clay; strong medium polyhedral structure; rough ped fabric; very firm consistence, moist; pH 5.8; clear change to:
B22	65-90 cm	Very dark grey (2.5Y3/1); many medium distinct strong brown (7.5YR4/6) mottles; medium clay; moderate medium parting to prismatic structure; smooth ped fabric; very firm consistence, moist; few faint slickenslides; few medium gravelly subrounded basalt; pH 6.8; diffuse change to:
B3/C	90-105 cm	Dark grey (2.5Y4/1); common fine distinct yellow (2.5Y6/3) and yellowish brown (10YR5/8) mottles; light clay, coarse sandy; moderate medium parting to prismatic structure; smooth ped fabric; strong consistence, slightly moist; very few faint slickenslides; many coarse gravelly basalt; carbonate; pH 7.0.

Chemical Properties of Upper 10 cm:

Depth (cm)	pH (water)	pH (CaCl₂)	EC dS/m	Exchangeable Cations				Total Carbon %	Total Nitrogen %	Organic Matter %	Available Aluminium mg/kg	Available Potassium (Skene K) mg/kg	Phosphorous (Olsen P) mg/kg	Available Sulphur mg/kg	Phosphorous Buffering Index
				Ca	Mg	K	Na
				meq/100g
0-10	5.2	4.8	0.11	6.0	1.7	0.24	0.25	4.4	0.32	8.1	11	100	21	17	150

Physical Properties of Upper 10 cm:

Depth (cm)	Bulk Density kg/L	Volumetric Water				Dispersion				Slaking
		At Saturation pF0 mL/100mL	Near Saturation pF1.0 mL/100mL	Field Capacity pF2.0 mL/100mL	Wilting Point pF4.2 mL/100mL	Dry		Remoulded
						2 Hour	20 Hour	2 Hour	20 Hour
0-10	1.10	54.6	49.5	43.5	10.5	NIl	NIl	NIl	NIl	Partial

Profile Described By: David Rees, October 2006.

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