CFTT13

SITE: CFTT 13	Site: Flynns Creek
Location: APP species/seedlot trial VRV147	*Aust. Soil Class.:* Bleached-Vertic, Magnesic, Grey CHROMOSOL
*Great Soil Group:* soloth	Tech. Class: 052-6-50/2-1-3-32
General Landscape Description: Level to gently undulating plain	Geology: Late Tertiary sediments
APP Mapping Unit: Stockdale

CFTT13 Landscape

Soil Profile Morphology:

Surface Soil

A1	0 – 15 cm	Dark brown (10YR3/3) sandy loam; weak medium angular blocky structure (less than 20 mm) parting to weak granular structure (less than 5 mm); weak consistence moderately moist; pH 4.8; clear and smooth transition to:	CFTT13 Profile
A21	15 – 40 cm	Brown (10YR5/3) sandy loam, sporadically bleached; slightly fine gravelly, subrounded quartz; massive; very firm dry; pH 5.2; clear and smooth transition to:
A22	40 – 60 cm	Pale brown (10YR6/3), conspicuously bleached (10YR8/2 dry), clayey sand; slightly fine gravelly, subrounded quartz; massive; very firm dry; pH 5.1; clear and smooth transition to:
Subsoil
B1	60 – 70 cm	Pale brown (10YR6/3), common, fine, faint, brownish yellow (10YR6/6) mottles, sandy clay; slightly fine gravelly, subrounded quartz; weak medium angular blocky structure; very firm moderately moist; pH 5.5; abrupt and smooth transition to:
B21	70 – 100 cm	Light brownish grey (10YR6/2); with many, coarse, prominent, brownish yellow (10YR6/6) with red (2.5YR5/8) mottles; medium clay; moderate coarse prismatic structure, parting to moderate medium lenticular structure; very firm consistence, moderately moist; pH 5.9; gradual and smooth transition to:
B22	100 – 140 cm	Pale brown (10YR6/3), many, coarse, prominent, brownish yellow (10YR6/8) with red (2.5YR5/8) mottles, medium clay; strong, coarse prismatic structure, parting to strong coarse angular blocky structure; very firm moderately moist; pH 6.4.
C		Soft decomposing sandstone from 1.4 m to 2.0 m - sandy clay in overall texture.

Key Profile Features:

Strong texture contrast between surface (A) horizons and subsoil (B) horizons
Bleached subsurface (A2) horizons

Soil Profile Characteristics:

	pH	Salinity Rating	Sodicity	Dispersion
Surface (A1 horizon)	Very strongly acid	Very low	Non-sodic	none
Subsoil (B21 horizon)	Moderately acid	Very low	Non-sodic	none
Deeper subsoil (at 1 m)	Slightly acid	Very low	-	none

The soil profile becomes less acid with depth.

The level of soluble salts is low throughout.

The level of exchangeable aluminium is higher
in the very strongly acid surface soil.

The clay content increases significantly at
the A/B horizon interface.

Horizon	Horizon Depth	pH (water)	pH CaCl2	EC 1:5	NaCl	Exchangeable Cations
						Ca	Mg	K	Na
						Meq/100g
A1	0-15	4.8	4	0.09		1.9	1.1	0.12	0.23
A21	15-40	5.2	4.4	<0.05		0.57	0.62	<0.05	0.07
A22	40-60	5.1	4.3	<0.05		0.23	0.39	<0.05	0.05
B1	60-70	5.5	4.5	<0.05		0.62	1.8	<0.05	0.18
B21	70-100	5.9	5.1	0.11		1.2	7.3	0.11	0.77
B22	100-140	6.4	5.7	0.11		0.18	6.9	0.08	1.1

Horizon	Horizon Depth	Ex Al mg/kg	Ex Ac meq/100g	Field pF 2.5	Wilting Point pF4.2 g/100g	Coarse Sand (0.2-2.0mm) %	Fine Sand (0.02-0.2mm) %	Silt (0.002-0.02mm) %	Clay (<0.002mm) %


A1	0-15	89	13	17	6.7	48.4	23.4	13.5	10
A21	15-40	28	2.1	11.6	3.4	49.7	25	15	10
A22	40-60	22	4	10.2	2.6	49.5	25.2	18.5	9
B1	60-70	23	4.9	14.2	6.1	39.4	24.6	16.5	19.5
B21	70-100	<10	7.4	28.6	17.8	19	10.6	7	41.5
B22	100-140		5.8	25.8	16.3	33	14.8	5	45

Management Considerations:

The subsoil has a very low exchangeable calcium:magnesium ratio. Calcium deficiency could occur as a result.

Profile described by: Ian Sargeant, Mark Imhof and Justin Wong (9/6/99)

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