Soil/Landform Unit 124

The undulating rises comprise scoria deposits near the most southern point of Lake Corangamite near Nalangil

Area:

441 ha

0.03% of CMA region

This unit consists of undulating rises near Nalangil at the southern most extent of the current Lake Corangamite shore. This small single unit is derived from ash, scoria and basaltic lava deposits and forms part unit of the volcanic Western Plains. This soil landform of the Western Plains is characterised by undulating low stony rises with prominent plains and minor depressions. Remnant vegetation classes of these undulating rises includes Swamp Scrub and Scoria Cone Woodland. These plains and low rises have black gradational soils with minor occurrences of brown gradational soils and shallow

friable

loams, especially in combination with surface stones on crests and upper slopes of rises. The depressions also comprise the black gradational soils of the plains and rises. The ash and scoria deposits are generally friable and highly productive due to high fertility. Land use is mainly dairy farming, grazing and minor cropping. The shallow soils tend to be susceptible to waterlogging (in wet seasons) and

compaction

Looking south towards Pirron Yallock over the undulating rises bordering Lake Corangamite
	Looking south towards the undulating rises that are mainly used for grazing and diary near Nalangil

Component	1	2	3
Proportion of soil-landform unit	15%	80%	5%
CLIMATE Rainfall (mm)	Annual: 750
Temperature (^oC)	Minimum 8, Maximum 19
Precipitation less than potential evapotranspiration	November-March
GEOLOGY Age and lithology	Quaternary scoria and minor basalt, Recent clay, sand and gravel
Geomorphology	6.1.3 Volcanic Western Plains with poorly developed drainage
LANDUSE	Uncleared areas: Nature conservation; water supply Cleared areas: Dairy farming; sheep and cattle grazing; cropping
TOPOGRAPHY Landscape	Undulating rises
Elevation range (m)	113-129
Local relief (m)	25
Drainage pattern	Centripetal - radial
Drainage density (km/km²)	1.3
Landform	Plains and minor low rises
Landform element	Low rises	Undulating plains	Drainage depressions
Slope and range (%)	3 (1-7)	1 (0-3)	1 (0-2)
Slope shape	Convex	Linear	Concave
NATIVE VEGETATION Ecological Vegetation Class	Swamp scrube (8.1%), Scoria Cone Woodland (5.9%)
SOIL Parent material	In situ basalt	Basaltic ash and colluvium	Basaltic ash and colluvium
Description (Corangamite Soil Group)	Neutral black and brown gradational soils and shallow friable loams (40) and black texture contrast soils (37)	Neutral black gradational soils (40) and black texture contrast soils (37)	Neutral black gradational soils (40) and black texture contrast soils (37)
Soil type sites	SW96, SW26, SW25	SW96, SW26, SW48	SW96, SW26, SFS5b
Surface texture	Clay loam to loam	Clay loam	Clay loam
Permeability	Moderate to high	Moderate	Low to moderate
Depth (m)	<1.5	<1.5	<2
LAND CHARACTERISTICS, POTENTIAL AND LIMITATIONS	Friable structured soil. Soil depth may be shallow to moderately deep with limited water holding capacity. Well drained and high nutrient holding capacity. Upper soil may be acidic.	Friable structured soil. Soil depth may be moderately deep with limited water holding capacity. Generally well drained and high nutrient holding capacity. Upper soil may be acidic.	Friable structured soil. Soil depth may be moderately deep with limited water holding capacity. Moderately well to imperfectly drained and high nutrient holding capacity. Upper soil may be acidic. Subject to waterlogging and compaction.

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