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 109 Alluvial Plains Land Unit: 7l2A Lithology: Alluvium Sites: 36 Area: 780 km2 Landform General Description Flat alluvial plains and backplains; Excoecaria parvifolia, Eucalyptus microtheca or Bauhinia cunninghamii low open woodland; very deep heavy cracking clays Slopes: 0 - 1% Parent Material: Alluvium Surface Gravel: 2 - 10% Rock Outcrop: 0% Drainage: Imperfectly to poorly drained Runoff: Slow Soil Most Common Soil: Brown Vertosols of sites: 13 Common Soil Characteristics Surface texture class: Clayey Subsoil texture class: Clayey Soil colour: Brown Surface soil gravels: < 2% Subsoils gravels: < 2% Soil depth: 1.5 - 5 m Field surface pH: 8.5 - 9.5 Field subsoil pH: 8.5 - 9.5 Other soils described: Aquic Vertosols, non-gravelly, clayey, very deep; Grey Vertosols, non-gravelly, clayey, very deep Vegetation Common vegetation community: of sites Pasture rating Av crown cover % Av height (m) Excoecaria parvifolia, Eucalyptus microtheca low open woodland 14 High 10 6 Bauhinia cunninghamii, +/- Excoecaria parvifolia, Atalaya hemiglauca, Eucalyptus microtheca low open woodland 12 High 11.5 7 Other communities: Mixed species black soil grasslands (5), Terminalia volucris +/- Bauhinia cunninghamii, Eucalyptus microtheca low open woodland (4), Corymbia grandifolia, Corymbia bella mid open woodland (1) Stratum Frequency of dominant species Frequency of other common species Upper stratum Excoecaria parvifolia 100%, Eucalyptus microtheca 79% Bauhinia cunninghamii 21% Mid stratum Excoecaria parvifolia 50% Eucalyptus microtheca, Terminalia volucris 29% Atalaya hemiglauca 21%, Bauhinia cunninghamii, Abelmoschus ficulneus 14% Ground stratum Ophiuros exaltatus 50%, Chrysopogon fallax 43%, Brachyachne convergens 36%, Iseilema sp. 29%, Cyperus bifax 21% Eriachne glauca 14% Dichanthium fecundum 21%, Oryza australiensis, Neptunia major, Panicum decompositum, Aristida latifolia 14% Land Evaluation Imperfectly to poorly drained Very deep soils Level to gentle slopes No rock outcrop Very high erosion risk: Soils have high levels of silt particularly in the topsoil. High to extreme sodic subsoil. High grazing pressure. These soils are extremely fragile; if the surface is exposed they are dispersive and will rapidly erode. Careful land management especially along tracks, fence lines and water points is essential. Any disturbance will require erosion and sediment control planning. Many of these plains in high rainfall wet seasons can remain inundated for extended periods, crab holes are common.
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