GL54

Location: Bolwarra

Australian Soil Classification: Mottled, Eutrophic, Red FERROSOL
General Landscape Description: Gently undulating plan
Site Description: Lower hill slope
Land Unit: Gorae Basalt
Geology: Quaternary basalt

General Land Unit Description: This soil type occurs in isolated patches between Portland and Dartmoor. It usually occupies small areas in between pockets of less productive soil (Ferric Brown Chromosols). The Chromosols have been used to represent this area as they are deemed to be the major soil type, and due to restrictions of scale this soil type has not been mapped as an individual unit. It must be noted however, that this soil type has a higher capability of supporting a range of land uses (e.g. viticulture) due to its favourable physical and chemical properties.





Soil Profile Morphology

A1	0-25 cm	Dark brown (7.5YR3/3) sandy clay loam, strong polyhedral structure (2-5 mm), firm consistence when dry, few small subrounded ferruginous and manganiferous nodules (2-5 mm), pH 6.4; transition to:
Subsoil
B21	25-50 cm	Reddish brown (5YR4/4) light clay, many very faint red mottles, medium (5-10 mm) to strong polyhedral structure (2-5 mm), strong consistence when dry, a few small subrounded ferruginous and manganiferous nodules, pH 6.5; transition to:
B22	50-110 cm	Reddish brown (5YR4/4) light clay, many prominent red weathered basalt inclusions, medium to strong polyhedral structure (5-10 mm), strong consistence when dry, pH 6.4; transition to:
B3	110+ cm	Brown (7.5YR4/4) light clay, many prominent red weathered basalt inclusions, medium to strong polyhedral structure (5-10 mm), very firm to strong consistence when dry, pH 6.5.

• High in free iron
• Well structured soil

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	0-30	6.4	6.0	0.30	4.1	0.27	18	12	11	4.8	1	0.5	9	31	16	34	38.2	20.1
B21	30-50	6.5	6.1	0.21				12	4.7	6.1	0.62	1	6	31	17	53	45.4	23.7
B22	50-70	6.4	6.0	0.24			12	13	3.6	6.6	0.64	1.2	5	16	12	62	44.2	26.3
B3	70-140	6.5	6.1	0.18				12	2.7	6.4	0.49	1	2	17	12	66	52.3	30.4