LSWW18

Red gum plains north of Langkoop		Site Code	LSWW18	Ferric (and Calcic), Mottled-Mesonatric, Grey SODOSOL
		Location	North of Langkoop, western Victoria
		Landform	Plain
		Geology	Quaternary swamp and lake deposits: paludal silt and clay
		Element	Plain




Horizon	Depth (cm)	Description
A1	0–25	Brown (7.5YR4/2); sand; weak structure; weak consistence when dry; pH 5.5; clear boundary to:
A2	25–42	Light brown (7.5YR6/4), conspicuously bleached; sand; massive (structureless); many (some patches 80-100%) ferruginous nodules; pH 6.1; abrupt boundary to:
B21	42–50	Light grey (10YR7/2) with abundant very coarse prominent yellowish brown and dark red mottles; light clay; strong coarse, parting to strong medium polyhedral structure; smooth ped-fabric; some ferruginous nodules; strong consistence when dry (complete dispersion when worked); pH 7.3; clear boundary to:
B22	50–85	Brownish yellow (10YR6/6) with dark red and brownish yellow mottles; light medium clay; strong coarse prismatic, parting to strong coarse blocky structure (some areas parting further to strong medium/fine polyhedral structure); brown clay skins, cutans; few ferruginous nodules; very firm consistence when slightly moist; pH 6.9:
B23	85–150	Brownish yellow (10YR6/6); medium heavy clay (sandy) with patches of yellow (10YR7/8) sand throughout; moderate very coarse prismatic structure; complete dispersion; pH 6.5:
B24	150–200+	Brownish yellow (10YR6/8) with light grey mottles; light clay; common soft calcareous and hard calcareous /silica nodules; pH 9.3.
Management Considerations
Strong texture contrast between the topsoil and subsoil. Sandy, acidic topsoil, susceptible to wind erosion. Bleached A2 horizon with ferric ‘ironstone’ pan, little available nutrient. Neutral subsoil, sodic (that is dispersive when worked), highly alkaline at depth but low salinity. Mottled subsoil with carbonate as lime or hard rock. Perched seasonal watertable. Plant Available Water Capacity (PAWC) is considered to be high (estimated at 190 mm) for this site profile based on an Effective Rooting Depth (ERD) of 85 cm. Rooting depth will be restricted by subsoil conditions, such as; strongly sodic (Exchangeable Sodium Percentage >20%), high soluble salt levels (chloride >0.1%), or poor structure (e.g. massive or very coarse, columnar or prismatic). Landform element is a plain, poor site drainage.

Horizon	Depth (cm)	pH (water)	pH (CaCl₂)	EC dS/m	Exchangeable Cations cmol-/kg				Wilting Point (pF4.2)	Coarse Sand %	Fine Sand %	Silt %	Clay %
Horizon	Depth (cm)	pH (water)	pH (CaCl₂)	EC dS/m	Ca	Mg	K	Na	Wilting Point (pF4.2)	Coarse Sand %	Fine Sand %	Silt %	Clay %
A1	0–25	5.5	4.4	<0.05	0.5	0.1	0.1	0.1	3.7	55.5	30.5	3	5
A2	25–42	6.1	4.8	<0.05	0.1	<0.1	<0.1	0.1
B21	42–50	7.3	6	0.06	4.2	5.9	0.5	2.2	24.4	12.3	12.6	2.5	67.5
B22	50–85	6.9	6	0.09	2.6	6.4	0.4	1.9	20.1	16.7	14.5	1.5	62
B23	85–150	6.5	5.2	0.07	1.3	6	0.2	2.6
B24	150–200+	9.3	8.5	0.38

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