OTR416

Location: Barramunga

Australian Soil Classification: Acidic-Mottled, Mesotrophic, Yellow DERMOSOL
Northcote Factual Key: Gn3.90

General Landscape Description: Mountains, Hills
Site Description: Ridge, Upper Slope Aspect: South
Native Vegetation: E. obliqua, E.cypellocarpa
Geology: Kl: Cretaceous fluvial sediments; felspathic sandstone, siltstone, mudstone (Eumeralla Formation).

Soil Profile Morphology:

Surface Soil

A11	0-1 cm	Black (10YR2/1); silty loam; strong very fine crumb structure; pH 5.0; sharp change to:
A12	1-15 cm	Very dark greyish brown (10YR3/2), loam; moderate fine subangular blocky structure; pH 4.8; clear change to:
A3	15-23 cm	Dark greyish brown (10YR4/2); sandy clay loam; moderate fine subangular blocky structure; pH 4.9; gradual change to:
Subsoil
B21	23-45 cm	Brownish yellow (10YR6/8), with a few greyish brown (10YR5/2) mottles; light clay; moderate medium angular blocky structure; pH 5.0; gradual change to:
B22	45-90 cm	Yellowish brown (10YR5/8); medium clay; strong subangular blocky structure; common greyish brown (10YR5/2) cutans; pH 4.9; clear and wavy change to:
C	90+ cm	Weathered sandstone.

Soil Profile Characteristics:

	pH	Salinity Rating	Sodicity
Surface (A1 horizon)	Strongly Acid	Medium	Non Sodic
Subsoil (B21 horizon)	Strongly Acid	Low	Non Sodic
Deeper Subsoil (at 120 cm)	Very Strongly Acid	Medium	-

The surface and upper subsoil are strongly acid. The C horizon is very strongly acid.

The salinity rating in the surface and the C horizon is medium. The upper subsoil has a low salinity rating.

This profile is non-sodic

The clay content is low to moderate.

Horizon	Horizon Depth (cm)	pH (water)	EC dS/m	Cl %	Organic Carbon %	Total N %	P ppm	K ppm	Free Fe %	Exchangeable Cations				Total Bases cmolc/kg	Ex Ac cmolc/kg	CEC cmolc/kg
										Ca	Mg	K	Na
										cmolc/kg
A11	0 - 1	5.0	0.23	0.018	8.7	0.46			1.1
A12	1 - 8	4.7	0.18	0.013	4.5	0.21	11	140	1.1	2.2	1.8	0.5	0.3	4.8	18.2	23.0
	8 - 15	4.8	0.11	0.008	2.6	0.11	7	140	1.9	0.7	1.3	0.4	0.3	2.7	16.5	19.4
A3	15 - 23	4.9	0.11	0.004	1.8	0.07			2.3
B21	23 - 30	5.0	0.09	0.007	1.0	0.05	3	120	2.3	0.3	1.1	0.3	0.2	1.9	9.3	11.3
B22	45 - 60	4.9	0.11	0.012	0.7	0.05	2	120	4.7	0.6	2.7	0.3	0.3	3.9	12.5	16.4
C	90 - 120	4.8	0.13	0.019	0.2	0.02			3.3

Horizon	Horizon Depth (cm)	Gravel %	Coarse Sand (0.2-2.0 mm)	Fine Sand (0.02-0.2 mm)	Silt (0.002-0.02 mm)	Clay (<0.002 mm)
A11	0 - 1	2
A12	1 - 8	1	16	35	27	16
	8 - 15	3	17	34	28	15
A3	15 - 23		16	33	27	20
B21	23 - 30	2	14	31	26	26
B22	45 - 60	2	11	21	20	44
C	90 - 120	10	42	31	13	12

Profile Described By: Frank Gibbons, 10th January 1966.

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