Undulating to gently undulating hillslopes at Pittong
0.11% of CMA region
The undulating low granitic hills south of Pittong are part of the granitic landscapes within the Midlands of the Western Uplands. This Devonian granite unit is located south of Pittong in the north of the catchment. The undulating slopes graduate into the prominent footslopes, drainage depressions and alluvial fans of Unit 18. Remnant vegetation on the granite is sparse with the Grassy Woodland, Heathy Dry Forest and Riparian Woodland among the major classes. The soils consist of an association of mottled texture contrast soils and deep brown sands. Areas of rocky outcrop occur on the upper slopes and crests with deep sands. Minor mottled sodic texture contrast soils occur on the mid to lower slopes. Unbleached mottled texture contrast soils with lighter textured surfaces may also occur on some of the lower crests. Land use is restricted to grazing and cropping due to the low available water holding capacity and ready leaching of nutrients from these soils. Gully erosion occurs to a moderate extent and is difficult to control on the steeper slopes and valleys of these hills. Salting is also expressed at the surface as evidenced by the presence of spiny rush.
Ferruginised Cainozoic deposits of a cutting overlooking the Pittong clay works
Weathered granite exposed in the cutting south of Pittong
Proportion of soil-landform unit
Minimum 7, Maximum 18
|Precipitation less than potential evapotranspiration|
Age and lithology
Uncleared: Nature conservation
Cleared: Sheep grazing; limited cropping (cereal)
Low granite hills
|Elevation range (m)|
|Local relief (m)|
|Drainage density (km/km2)|
Crest and upper slopes
|Slope and range (%)|
Ecological Vegetation Class
Gassy Woodland (6.6%), Heathy Dry Forest (0.7%), Riparian Woodland (0.1%)
(Corangamite Soil Group)
Deep brownish sands (4)
Acidic mottled brown, grey or yellow texture contrast soils (3)
Sodic mottled brown, grey or yellow texture contrast soils (2)
|Soil type sites|
Coarse sandy clay loam
Sandy clay loam
Moderate to high
|LAND CHARACTERISTICS, POTENTIAL AND LIMITATIONS|
Uniform sand, deep texture contrast, very low nutrient holding capacity and water holding capacity in sandy soils, high in underlying clays. Susceptibility to deep seepage, nutrient decline and sheet erosion.
Moderate slope, low permeability and hardsetting surfaces with overland flow common. Rapid subsurface flow associated with deep seepage, leaching of salts, rill and gully erosion, and sheet erosion.
Moderate slop, low permeability and hardsetting surfaces may cause overland flow. Rapid subsurface flow associated with deep seepage, leaching of salts, rilly and gully erosion, and sheet erosion.