GL161

Australian Soil Classification: Mottled, Mesotrophic, Brown CHROMOSOL (confidence level 1)

General Landscape Description: Low hills.
Site Description: Upper slope (1%)
Land Unit: Nareen Granite
Geology: Ordovician granite / granodiorite
General Land Unit Description: This site is located on a granite low hill. The soils have granite parent material occurring at around one metre. Further down the slope there is a band of trachyte (GL162) outcropping. The area is a mix of geologies. This is the major soil type representing the Nareen Granite land unit, although it has not been mapped as granite due to restrictions of scale.







Soil Profile Morphology:

Horizon	Depth (cm)
A1	0-10	Very dark greyish brown (10YR3/2); coarse sandy loam; weak medium subangular blocky structure; very firm consistence, dry; pH 5.9; gradual change to:
A2	10-30	Dark greyish brown (10YR4/2); sandy loam; weak to massive structure; very firm to strong consistence; pH 5.2; clear change to:
B21	30-50	Yellowish brown (10YR5/4), with many distinct coarse red (2.5YR4/6) mottles; medium heavy clay; moderate fine subangular blocky structure; strong consistence, dry; organic staining present; pH 5.6; gradual change to:
B22	50-85	Yellowish brown (10YR5/6), with many distinct medium dark yellowish brown (10YR4/6) mottles; medium clay; strong fine lenticular structure; strong consistence, dry; pH 6.0; diffuse change to:
B23	85-100	Light olive brown (10YR5/6), many prominent medium dark yellowish brown (10YR4/6) mottles; medium clay; moderate to strong lenticular to polyhedral structure (10-50 mm), consistence firm, dry; pH 6.2; gradual change to:
BC	100-150	Weathered granite; gradual change to:
C	150-170	Weathered granite.

Horizon	Horizon Depth (cm)	pH (water)	pH (CaCl2)	EC dS/m	Organic Carbon %	Total Nitrogen %	Exchangeable Aluminium ppm	Exchangeable Acididty meq/100g	Exchangeable Cations				Coarse Sand (0.2-2.0 mm) %	Fine Sand (0.02-0.2 mm) %	Silt (0.002-0.02 mm) %	Clay (<0.002 mm) %	Field Capacity % w/w	Wilting Point % w/w
									Ca	Mg	K	Na
									meq/100g
A1	0-10	5.9	5.6	0.14	5.4	0.34	<10	9.6	6.3	1.3	0.74	0.2	37	25	9	21	36.7	12.3
A2	10-30	5.2	4.5	<0.05			32	7.4	1.7	0.81	0.15	0.07	34	32	9	22	18.3	8.3
B21	30-50	5.6	4.9	<0.05			14	8.7	3.3	3.8	0.21	0.17	12	15	7	66	31.0	21.2
B22	50-85	6.0	5.9	0.06			<10	7.1	3.4	4.1	0.19	0.24	6	13	8	73	37.2	24.6
B23	85-100	6.2	6.0	0.06					3.4		0.14	0.31					43.5	26.3

• Strongly acidic A2 horizon
• Mottled subsoil
• Strong texture contrast between topsoil and subsoil