Site IS18

Location: Drung Drung

Australian Soil Classification: Hypocalcic, Subnatric, Brown SODOSOL

General Landscape Description: Anastomotic plain.
Geology: Quaternary Shepparton Formation: fluvial silt, sand and minor gravel.

IS18 Landscape

Soil Profile Morphology:

Surface Soil

A1	0-10 cm	Dark brown (10YR4/3); sandy clay loam; hardsetting surface condition; weak coarse granular structure; very strong consistence dry; pH 7.4; sharp and smooth boundary to:
Subsoil
B211	10-40 cm	Brown (7.5YR4/4); light clay; subplastic; moderate coarse prismatic structure; very strong consistence dry; sticky consistence wet; pH 8.4.
B212	40-60 cm	Brown (7.5YR4/4); heavy clay; subplastic; moderate coarse prismatic structure; very strong consistence dry; sticky consistence wet; pH 9.4; clear and smooth boundary to:
B22	60-90 cm	Pale brown (10YR6/3) with yellowish red (5YR5/8) mottles; medium clay; plastic; weak coarse subangular blocky structure; very strong consistence dry; sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.1; gradual boundary to:
B23	90-120 cm	Light brownish grey (10YR6/2); heavy clay; plastic; weak coarse subangular blocky structure; very strong consistence dry; sticky consistence wet; very few (<2%) hard carbonate segregations; pH 9.1.

Soil Profile Characteristics:

Horizon	Sample Depth cm	pH		EC dS/m	Sodium Chloride %	Exchangeable Calcium cmol-/kg	Exchangeable Magnesium cmol-/kg	Exchangeable Potassium cmol-/kg	Exchangeable Sodium cmol-/kg	Exchangeable Aluminium mg/kg	Exchangeable Acidity cmol-/kg	Field Capacity -30^okPa	Permanent Wilting Point -1500^okPa	Coarse Sand %	Fine Sand %	Silt %	Clay %
Horizon	Sample Depth cm	H₂O	CaCl₂	EC dS/m	Sodium Chloride %	Exchangeable Calcium cmol-/kg	Exchangeable Magnesium cmol-/kg	Exchangeable Potassium cmol-/kg	Exchangeable Sodium cmol-/kg	Exchangeable Aluminium mg/kg	Exchangeable Acidity cmol-/kg	Field Capacity -30^okPa	Permanent Wilting Point -1500^okPa	Coarse Sand %	Fine Sand %	Silt %	Clay %
A1	0–10	7.4	NA	0.07	0.01	9	1.3	1.4	0.1	NA	3.7	NA	9.7	14	46	12	27
B211	10–40	8.4	NA	0.64	0.03	13.9	17.5	1.9	5.7	NA	3.9	NA	30	3	14	7	72
B212	40–60	9.4	NA	0.59	0.05	6.8	15.4	1.7	6.3	NA	NA	NA	23.1	5	26	11	53
B22	60–90	9.1	NA	0.86	0.12	5.5	14.4	1.5	6.9	NA	NA	NA	21.8	5	34	11	47
B23	90–120	9.1	NA	0.94	0.12	5	12.6	1.4	7.2	NA	NA	NA	20.5	7	35	12	43
B24	120–150	9.1	NA	1.01	0.15	NA	NA	NA	NA	NA	NA	NA	21.2	5	31	12	48
B25	150–185	9.2	NA	1.02	0.14	NA	NA	NA	NA	NA	NA	NA	19.5	5	32	11	43
B26	185–215	9.2	NA	0.95	0.15	NA	NA	NA	NA	NA	NA	NA	19.9	3	38	9	42
B27	215–245	8.9	NA	0.77	0.14	NA	NA	NA	NA	NA	NA	NA	17.2	1	46	10	42
B28	245–275	8.7	NA	0.69	0.13	NA	NA	NA	NA	NA	NA	NA	17.3	2	46	11	41

Note: NA=not assessed.

Management Considerations:

Very strong texture contrast (27% to 72% clay), clay decreasing with depth.
Alkaline soil, slightly decreasing at depth, high level of nutrients in upper subsoil (B22 horizon).
Thin surface horizon with, poor structure and high fine sand component.
Subsoil is sodic, becoming strongly sodic with depth and high salinity values below 45cm.
Upper subsoil has strong colour and no mottling, indicating little restrictive water and air movement.
Subsoil is pale and mottled below 60cm, indicating some restricted drainage.
Landform element, plain; slow site drainage, unless near drainage line.

Profile Described By: John Martin, Nabil Badawy, Ron Cawood, Geoff Pope, John Galea, John Turner (1970).

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