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Soil/Landform Unit 151

Landform Unit Description

Unit 151 image a
Red cultivated soils on the slopes of this rise near Foxhow
      Area: 55 ha
      <0.01% of CMA region

      This very small singular unit with a sole component occurs west of Foxhow on the north shore of Lake Gnarpurt. It abuts lunettes (Unit 146) and drainage depressions (Unit 166). Remnant native vegetation of this unit is Grassy Woodland. The soils are alkaline (strongly sodic) red texture contrast soils (Sodosols). Given the locality and topographic position, this unit is moderately rapidly drained, but the strongly sodic nature will mean susceptibility to structure decline particularly in the upper soil. Nutrient decline and compaction are also concerns. Land use is grazing; the limited area and the position precludes many primary enterprises.
Unit 151 geomorphology

Unit 151 image b
Cropping of this rise has been common given current
cropping and stubble retention
Unit 151 cross section

Unit 151 graph

Unit 151 image c
Undulating landscape autting the rise of this unit

Component
1
Proportion of soil-landform unit
100%
CLIMATE
Rainfall (mm)

Annual: 590
Temperature (oC)
Minimum 8, Maximum 19
Precipitation less than potential evapotranspiration
October-March
GEOLOGY
Age and lithology

Neogene
fluvial sediments, Quaternary source bordering sand dunes
Geomorphology
LANDUSE
Uncleared: Nature conservation; water supply
Cleared: Beef cattle and sheep grazing; cropping (cereal)
TOPOGRAPHY
Landscape

Gently undulating sandy rise
Elevation range (m)
114-134
Local relief (m)
20
Drainage pattern
Centripetal
Drainage density (km/km2)
2.5
Landform
Sandy rise
Landform element
Rise
Slope and range (%)
2 (0-5)
Slope shape
Convex
NATIVE VEGETATION
Ecological Vegetation Class

Grassy Woodland (20.8%)
SOIL
Parent material

Sand, silt and clay
Description
(Corangamite Soil Group)
Alkaline red texture contrast soils (18)
Soil type sites
Surface texture
Clay loam
Permeability
Moderate to low
Depth (m)
<2
LAND CHARACTERISTICS, POTENTIAL AND LIMITATIONS
Texture contrast, moderate water holding capacity and nutrient holding capacity in upper soil, higher in subsoil. Sodic subsoil, often strongly, hardsetting when dry. May be sodic in upper soil also. Moderate site drainage with water shedding common.
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