GL63

Location: Mortlake

Australian Soil Classification: Ferric, Eutrophic, Yellow CHROMOSOL (confidence level 1)
General Landscape Description: Level to gently undulating plains
Site Description: Crest
Land Unit: Condah Basalt
Geology: Quaternary basalt

General Land Unit Description: The undulating plains and rises of the Condah area mainly consist of Ferric Chromosols. On the lower slopes bleached A2 horizons and mottled subsoils are common. On the broad level crests, gilgai microrelief is common.

Soil pit GL63 auger

Soil Profile Morphology

A1	0-10 cm	Very dark greyish brown (10YR3/2) fine sandy clay loam, strong polyhedral structure (5-15 mm), firm consistence when dry, many small subrounded ferromanganiferous nodules (2-5 mm), pH 7. Clear transition to:
Subsoil
B1	10-20 cm	Very dark greyish brown (10YR3/2), sandy clay, faint medium orange mottles are common, massive structure, very firm consistence when dry, pH 6.5. Clear transition to:
B2	20-50 cm	Brownish yellow (10YR6/6), light clay, distinct medium orange and red mottles are common, moderate to strong polyhedral structure (10-20 mm), very firm consistence when dry, many small subrounded ferromanganiferous nodules (2-5 mm), pH 6. Diffuse transition to:
BC	50-106 cm	Many distinct medium red and orange mottles (5-15 mm), strong subangular blocky structure, firm consistence when dry.

Key profile features:

Strong texture contrast between topsoil and subsoil
Many ferromanganiferous nodules in topsoil
Mottled subsoil

Soil Profile Characteristics:

-	pH	Salinity	Sodicity	Dispersion
Surface Soil (A1 horizon)	Slightly Acid	Low	Non-Sodic	None
Subsoil (B2 Horizon)	Slightly Acid	Very Low	Non-Sodic	None

Chemical and Physical Analysis:

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	0-15	6.6	6	0.13	4	0.13		8.6	8.1	1.9	0.48	0.29	37	24	12	20	24.3	10.8
B1	15-37	6.3	5.6	0.08			<10	9.9	2.2	3.5	0.28	0.23	30	17	9	42	21.6	16.7
B2	37-84	6.1	5.9	0.08			<10	11	1.8	5.1	0.18	0.49	13	11	10	67	15.1	26.5

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