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1. Red texture contrast soils/Dissected Uplands: Palaeozoic non-granitic plateaux, mountains, hills and plains

This soil has developed on mainly sedimentary and metamorphic material (rock or colluvial material) and occasionally on acid volcanics in the Western Uplands. This soil is slightly acidic, often tending to neutral with depth.

The surface soil is usually a dark weakly structured sandy loam to sandy clay loam. It overlies a reddish brown weakly structured sandy clay loam to fine sandy clay loam subsurface horizon that is also weakly structured and contains variable amounts of coarse sandstone fragments. This horizon may be bleached. There is a clear change to a yellowish red medium clay upper subsoil horizon. This is strongly structured (with medium to fine sized peds) and contains weathered sandstone fragments. At depth the profile grades into lighter textured material and the underlying bedrock (Palaeozoic sandstone). The depth is about 60 cm or more with variable depths of the surface horizons, generally 10 cm for the surface and 15 cm for the subsurface.

Notable features include:

WLRA Soil Group No. 1
  • Texture contrast and associated structure differences between the surface horizons and subsoil.
  • Variants may be browner or paler in poorer drainage situations and possibly more dispersive.
  • The deeper subsoil may become sodic, calcareous and contains manganese segregations.
  • The lighter textured topsoil may be susceptible to sheet, rill and wind erosion.
Soil Sites
Site code
Soil-landform unit
Component
ASC
FK
1:100 000 mapsheet
LP83Landsborough footslopesHillcrestHaplic, Mesotrphic, Red ChromosolDr2.21T7254 - St Arnaud
DOAGW32Rhymney hillsHillslope?-Sodic, Mesotrophic, Red ChromosolDr2.12T7423 - Ararat
LP82Pyrenees RangesHillslopeBleached-Sodic, Mesotrophic, Brown ChromosolDy2.42T7254 - St Arnaud
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