GL62

Location: Heywood

Australian Soil Classification: Bleached-Mottled, Eutrophic, Brown CHROMOSOL (confidence level 1)
General Landscape Description: Undulating plains
Site Description: Mid-slope to lower slope, 7%
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 GL62 auger

Surface Soil
A1	0-25 cm	Dark brown (10YR3/3); sandy clay loam; massive structure; firm consistence, dry; contains very few subrounded ferric fragments; field pH 6.0; changes to:
A21	25-50	Brown (10YR5/3), bleached, white (10YR8/2d); fine sandy clay loam; massive structure; very firm consistence, dry; very few subrounded ferric fragments; field pH 6.5; changes to:
A22	50-60	Yellowish brown (10YR5/4), sporadically bleached light grey (10YR7/2), with many faint yellow mottles; light clay; weak fine subangular blocky blocky structure; smooth ped fabric; very firm consistence, dry; contains a few subrounded ferric fragments; field pH 6.5
Subsoil
B21	60-80 cm	Yellowish brown (10YR4/6), with many distinct red and faint yellow mottles; heavy clay; strong fine parting to very fine subangular blocky structure; smooth ped fabric; very firm consistence, dry; contains very few ferric fragrments; field pH 6.0; changes to:
B22	80-140 cm	Yellowish brown (10YR4/6), with many prominent red, yellow and orange mottles; heavy clay; strong fine parting to very fine subangular blocky structure; smooth ped fabric; very firm consistence, dry; field pH 7.0; changes to:
B3	140+ cm	Pale brown (10YR6/3), with many prominent red mottles; weak structure; strong consistence, dry; field pH6.0.

Key profile features:

Bleached A2 horizon
Mottled subsoil
Strong texture contrast between topsoil and subsoil
Kaolinite at depth

Soil Profile Characteristics:

-	pH	Salinity	Sodicity	Dispersion
Surface Soil (A1 horizon)	Moderately Acid	Low	Non-Sodic	None
Subsoil (B21 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	0-22	5.6	4.9	0.1	5.3	0.16	14	11	3.5	1.3	0.37	0.19	18	45	18	15	24	10
A21	22-54	5.7	4.9	<0.05			12	4.5	0.79	0.66	0.14	0.09	24	48	19	9	17	4
A22	54-74	6	5.4	0.11			11	11	3.4	8	0.28	0.94	7	17	8	67	50	28
B21	74-134	6.3	5.8	0.12			11	9.4	3.1	9.6	0.23	1.6	6	13	7	74	48	29

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