GL55

Location: Bolwarra

Australian Soil Classification: Ferric, Natric, Brown KUROSOL (confidence level 1)
General Landscape Description: Gently undulating plan
Site Description: Lower slope, 2%
Land Unit: Gorae Basalt
Geology:

General Land Unit Description: This land unit has a variety of soil types occurring over a short distance. This soil type, along with Ferrosols and Black Chromosols are found is association with the more dominant Ferric Brown Chromosols. The Brown Chromosols have been used to represent this area as they are deemed to be the major soil type, and due to restrictions of scale the other soil types have not been mapped as individual units. It must be noted however, that the better drained soils (Red Ferrosols / Dermosols) have a higher capability of supporting a range of land uses (e.g. viticulture) due to their favourable physical and chemical properties.

Soil Profile Morphology:




Surface

A1	0-25 cm	Dark greyish brown (10YR4/2), sandy clay loam, weak angular blocky structure, strong consistence when dry, few small ferromanganiferous nodules (2-4 mm), pH 6.0; clear transition to:
Subsoil
B1	25-40 cm	Dark yellowish brown (10YR4/4) light clay, moderate angular to subangular blocky structure, consistence firm when dry, many small subrounded ferromanganiferous nodules (2-5 mm), pH 5.6; gradual transition to:
B21	40-75 cm	Yellowish brown (10YR5/4), light clay, faint medium orange and pale mottles are common, weak subangular blocky structure, consistence strong when dry, many small subrounded ferromanganiferous nodules (2-5 mm), pH 5.4; gradual transition to:
B22	75-135 cm	Yellowish brown (10YR5/4), light medium clay, many distinct medium red, orange and pale mottles, consistence firm when dry, moderate subangular blocky structure, small to medium subangular ferromanganiferous nodules (2-10 mm) are common, pH 5.5; diffuse transition to:
C	135-200 cm	Many distinct coarse red and orange mottles pH 5.3.

• Strongly acidic subsoil
• Many ferromanganiferous nodules in subsoil
• Mottled subsoil
• Topsoil slightly dispersive when worked when wet

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	5.4	0.13	1.1	0.06	12	7.4	2.9	1.4	0.26	0.39	7	55	17	18	18.8	8.3
B1	30-50	5.6	4.9	0.15			23	9.9	1.4	3.7	0.34	0.79	7	36	13	44	27.9	17.3
B21	50-80	5.4	5.2	0.23			11	12	2.1	4.6	0.26	1.3	5	22	8	63	35.7	25
B22	80-100	5.5	5.2	0.21			12	11	2.6	4.8	0.18	1.3	2	25	9	63	35.4	25.1
C	100-200	5.3	5	0.42			17	11	3.5	4.5	0.1	1.1	5	24	9	60	40.7	25.6