What is a Chromosol soil?
Chromosols are soils that display a strong texture contrast between surface (A) horizons and subsoil (B) horizons. The upper part of the subsoil ranges from slightly acid to alkaline (pH >5.5) but is not sodic. The subsoils of the Brown, Yellow and Grey variants are often mottled.
What is a dystrophic soil?
DYSTROPHIC: See base status. EARTHS: A Great Soil Group (Stace et al., 1968) description defining a variable group of soils which are porous and sandy textured. This term is used as a Subgroup distinction for Vertosols in the Australian Soil Classification (Isbell, 2002).
What is Ferrosol soil?
Ferrosols are non texture contrast soils that have a high free iron content in the B horizon (subsoil). They are nearly always found only on basic volcanic material and are nearly always red coloured.
What are sodosols soils?
Sodosols. Sodosols are texture-contrast soils with impermeable subsoils due to the concentration of sodium. These soils occupy a large area of inland Queensland. Generally Sodosols have a low-nutrient status and are very vulnerable to erosion and dryland salinity when vegetation is removed.
What is Shortlands soil?
SHORTLANDS/LUVISOL SOILS. Soils that could be described as Shortlands (Oxidic) soils in the South African classification system were identified over 165ha or 76% of the IAIP site (see Figure 4). This soil is characterised by an Orthic A horizon over a red structured B horizon.
What is a Subplastic soil?
SODICITY: Is a measure of exchangeable sodium in relation to other exchangeable cations. It is expressed as the Exchangeable Sodium Percentage (ESP). The top 20 cm of the B2 horizon is sodic and is not strongly acid. Soils with a subplastic B2 horizon are excluded.
What are the known profile properties of Chromosol?
Chromosols have a strong contrasting texture. They are not strongly acidic or sodic in the upper B horizon. The parent material of Chromosols ranges from highly siliceous, siliceous to intermediate in composition.
What is podzolic soil good for?
The best agricultural use of Podzols is for grazing, although well-drained loamy types can be very productive for crops if lime and fertilizer are used. The E horizon (or Ae in Canadian soil classification system), which is usually 4 to 8 centimetres (1.6 to 3.1 in) thick, is low in Fe and Al oxides and humus.
Where do Podzols form?
Podzols form under forested landscapes on coarse parent material that is high in quartz. They have a characteristic subsurface layer known as the spodic horizon made up of accumulated humus and metal oxides, usually iron and aluminum.
What is Urvara and Usara?
In ancient times, soils used to be classified into two main groups – Urvara and Usara, which were fertile and sterile, respectively.
What is yellow Chromosol soil used for?
Western Australia – Yellow Chromosol The Yellow Chromosol, also known as Grey Sandy Duplex soils, feature a sandy, usually grey coloured, topsoil over a mottled clay subsoil. Widespread in south-west WA, they are used for forestry, grazing, viticulture and cropping.
What is the difference between Brown and yellow Chromosols?
The surface soils are silty and some of these soils can be dispersive. Brown and Yellow Chromosols generally have poorer drainage than the Red Chromosols and have either whole-coloured or mottled subsoils (B horizons).
What is the definition of soil?
This definition is from Soil Taxonomy, second edition. soil – Soil is a natural body comprised of solids (minerals and organic matter), liquid, and gases that occurs on the land surface, occupies space, and is characterized by one or both of the following: horizons, or layers, that are distinguishable from…
What are the different types of Chromosols?
Using the Australian Soil Classification, Chromosols can be grouped further (in to Suborders) based on the colour of the upper 20 cm of the subsoil (i.e. Red, Brown, Yellow, Grey and Black).