CFTT15

CFTT15-16 Landscape

Soil Profile Morphology:

Surface Soil

A1	0 – 40 cm	Very dark grey (10YR3/1) loamy sand; single grained; very weak consistence moist; pH 4.6; gradual and smooth transition to:	CFTT15 Profile
A2	40 – 60 cm	Dark grey (10YR4/1) loamy sand; single grained; loose dry; pH 5.0; sharp and wavy transition to:
Subsoil
Bhs	60 – 90 cm	Dark brown (7.5YR3/4), with medium distinct strong brown (7.5YR5/6) mottles common, sand; single grained; very many ferruginous-organic nodules (less than 60 mm); pH 4.9; clear, wavy and irregular transition to:
C1	90 – 140 cm	Brownish yellow (10YR6/6) sand, single grained; pH 5.8; clear and wavy transition to:
C2	140 – 160 cm	White (10YR8/1), many, very coarse, prominent yellowish brown (10YR5/8) with red (2.5YR4/8) mottles, fine sandy medium clay; pH 5.6; strong consistence moist.

Key Profile Features:

• Deep sandy surface horizons.
• Many ferruginous-organic nodules (‘coffee rock’) in upper subsoil (ie. Bhs horizon)

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

The upper soil profile is very strongly acid; becoming moderately acid at depth.

The coarse sand content is high throughout most of the soil profile.

The clay content is low throughout most of the soil profile.

Horizon	Horizon Depth	pH (water)	pH CaCl2	EC 1:5	NaCl	Exchangeable Cations
						Ca	Mg	K	Na
						Meq/100g
A1	0-40	4.6	3.9	<0.05		0.26	0.2	<0.05	<0.05
A1b		5	4	<0.05		1.2	0.37	<0.05	0.1
A2	40-60	4.9	4.1	<0.05		0.26	0.1	<0.05	<0.05
C1	90-140	5.8	5	<0.05		0.21	0.15	<0.05	0.06
C2	140-160	5.6	4.6	<0.05		0.68	2.9	<0.05	0.14

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	0-40	40	4.1	4.2	2.1	31.8	62.1	1	2
A1b		47	8	7.2	2.8	29.8	61.6	3	2.5
A2	40-60	17	2.4	4.5	1.2	29.8	61.2	2	1.5
C1	90-140	<10	2.7	5.2	4.3	20.6	70.6	1.5	4.5
C2	140-160	38	4.9	22.4	12.7	6.4	55.3	3	35.5

• Sandy clays continue to 2m depth. This is a shallow version of Flynn Sand soil type.

• Plant Available Water Capacity (PAWC) is low for sandy soils such as these. The soils are, however, well drained.
• These strongly acidic sandy soils have a very low nutrient holding capacity and are considered infertile – being naturally deficient in nitrogen, phosphorus, sulphur and potassium. Nitrate and sulphate are readily removed by leaching. Deficiencies of trace elements such as copper, zinc and molybdenum are likely to occur. The trace element boron (B) leaches rapidly through acid sandy soils and deficiencies are also likely to occur.