IS18

Location: Drung Drung

Australian Soil Classification: Hypocalcic, Subnatric, Brown SODOSOL

Northcote Factual Key: Db1.13
Great Soil Group: No suitable group.
Soil Type: Drung Sandy Clay Loam.

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

IS18 Landscape

A1	0-10 cm	Brown (7.5YR4/3); 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.

Horizon	Sample Depth cm	pH H2O	EC dS/m	Sodium Chloride %	Exchangeable Calcium cmol-/kg	Exchangeable Magnesium cmol-/kg	Exchangeable Potassium cmol-/kg	Exchangeable Sodium cmol-/kg	Total Nitrogen %	Exchangeable Acidity cmol-/kg	Organic Carbon %	Permanent Wilting Point -1500okPa	Coarse Sand %	Fine Sand %	Silt %	Clay %
A1	0–10	7.4	0.07	0.01	9	1.3	1.4	0.1	0.07	3.7	0.79	9.7	14	46	12	27
B211	10–40	8.4	0.64	0.03	13.9	17.5	1.9	5.7	0.09	3.9	0.63	30	3	14	7	72
B212	40–60	9.4	0.59	0.05	6.8	15.4	1.7	6.3	0.03		0.23	23.1	5	26	11	53
B22	60–90	9.1	0.86	0.12	5.5	14.4	1.5	6.9	0.02		0.15	21.8	5	34	11	47
B23	90–120	9.1	0.94	0.12	5	12.6	1.4	7.2	0.02		0.07	20.5	7	35	12	43
B24	120–150	9.1	1.01	0.15								21.2	5	31	12	48
B25	150–185	9.2	1.02	0.14								19.5	5	32	11	43
B26	185–215	9.2	0.95	0.15								19.9	3	38	9	42
B27	215–245	8.9	0.77	0.14								17.2	1	46	10	42
B28	245–275	8.7	0.69	0.13								17.3	2	46	11	41

• 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.