Land Resources of Auvergne Station
A supplement to the Land Resources of the Victoria River District
Napier, Diane; Edmeades, Bart; Lynch, Brian; McGregor, Robert; Northern Territory. Department of Environment and Natural Resources
E-Publications; E-Books; PublicationNT; Jul-18
Auvergne Station; NT Portion 2676; Victoria River Downs; Victoria River District
This report for Auvergne Station is a supplement to Land Resources of the Victoria River District (2012) and completes the land resource assessment of the district which covers 24 properties and approximately 78 760 km² of pastoral land. Land unit mapping at 1:100 000 describes the landforms, soils and vegetation in the district.
Made available via the Publications (Legal Deposit) Act 2004 (NT)
Table of contents; 1. Introduction; 2. Previous mapping; 3. Survey methodology and data collection; 4. Lithology; 5. Landform; 6. Soil; 7. Soil physical and chemical characteristics; 8. Vegetation; 9. Land evaluation; 10. Soil erosion; 11. Land unit descriptions; 12. References; Appendices 1 - 12.
Soils -- Northern Territory -- Auvergne Station; Land use -- Northern Territory -- Auvergne Station; Geology -- Northern Territory -- Auvergne Station; land resource assessment; land units; soil landscapes; vegetation communities
Northern Territory Government
204 pages ; colour photographs, maps, figures, tables ; 30 cm.
Attribution International 4.0 (CC BY 4.0)
Northern Territory Government
http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=E3F20A909A8123ADE040CD9B21446CC0; http://hdl.handle.net/10070/245323 [Land resources of the Victoria River District]
Land Resources of Auvergne Station A supplement to the Land Resources of the Victoria River District 20 they are often referred to as black soils or cracking clays. The Vertosols on Auvergne are associated with active and relict alluvial plains. The extensive alluvial plains are almost entirely Vertosols and are strongly influenced by the Victoria, West and East Baines Rivers. Much of the water flow on Auvergne drains via the West and East Baines that converge to form a major tributary of the Victoria River. The alluvial wash across these plains has largely been deposited from the fluvial action of these rivers. Clay content is very high (>35%) throughout the profiles with strong gilgai present on the land surface. Grey and Brown Vertosols are the most extensive, contain little gravel throughout the profile and are generally very alkaline at depth. Calcareous nodules or concretions are common at depth in these soils. Grey Vertosols in the north were increasingly mottled due to longer inundation periods during the Wet than the alluvial plains in the south. Some of these plains can be completely inundated in the Wet and remain saturated for long periods. Poorly drained mottled Aquic Vertosols are also present and it is common to find crab holes and crab shells. The majority of Vertosols are self-mulching. Dermosols Dermosols are soils with structured B horizons and lacking strong texture contrast between A and B horizons (Isbell and NCST 2016). They are common on older colluvial landscapes where clay has been deposited at depth and river levees, terraces and backplains. They are typically deep and non-gravelly but this can depend on position in the landscape. Tenosols Tenosols are soils with weak pedological development apart from A horizons (Isbell and NCST 2016). They incorporate a diverse range of soils. Two common types occur on the property. These include very shallow brown sandstone profiles in rugged terrain on low hills or plateau surfaces on the east and west boundaries. Colluvial sands (Tenosols) are also found on plains at the base of the sandstone hills on the boundary of Judbarra National Park. These areas are generally deep red sands that have formed from colluvial wash from this elevated landscape. Chromosols Chromosols are soils other than Hydrosols that have a clear or abrupt texture contrast between the A (surface soil) and B horizons (subsoil) and are neither sodic nor acidic at depth (Isbell and NCST 2016). They are commonly referred to as duplex or texture contrast soils. Chromosols are not strongly aligned to a lithological group other than to some degree the colluvial plains. They are quite often present as a minor soil in land units so their extent is difficult to estimate. However significant areas occur on siltstone plains and rises. Soil exposures along old tracks and eroded gullies along the Auvergne Stock Route indicate that clear or abrupt B horizons are present at 20 - 30 cm below the surface. Hydrosols Hydrosols cover a diverse group of soils in which the greater part of the profile is saturated for at least 2 - 3 months in most years (Isbell and NCST 2016). In the Top End they are commonly referred to as poorly drained or seasonally inundated soils but some may not dry out during
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