The land resources of Cobourg Peninsula
by B. Wood and D. Sivertsen
Wood, B.; Sivertsen, D.; Conservation Commission of the Northern Territory
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Made available via the Publications (Legal Deposit) Act 2004 (NT).; This report describes a land system survey over the Cobourg Peninsula broadly describing landform, soils and vegetation to assist the effective planning and management of the area as a National Park.
1. Introduction -- 2. Summary Descriptions -- 3. Land Systems -- 4. Soils -- 5. Vegetation -- Appendices -- Acknowledgements.
Land use -- Northern Territory -- Cobourg Peninsula; Vegetation mapping -- Northern Territory -- Cobourg Peninsula
Conservation Commission of the Northern Territory
iv, 80,  p. : col. ills. ; 30 cm.
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defined in this report. Each soil profile examined was allocated a Principal Profile Form (Northcote, 1979) and the soil terminology used in the descriptions is from the Australian Land and Soil Survey Handbook (McDonald et a7. 1984). The soil nomenclature of Northcote et a7 (1975) has been included to aid in the comparison of soils from other areas. The soil classification is summarised in Table 4.1 A general description of the families described is outlined in Appendix II. 4.4 Soil Geography 4.4.1 Soils of the Laterized Upland Surface The upland surface can be subdivided into (i) the flat to gentl y undulat i ng "i ntact" Cretaceous surface characteri sed by Ramsay Land System, (ii) the dissected undulating to hilly terrain characterised by Caiman Land System, and (iii) the areas draining these two systems, i.e. Alaru Land System. (i) Soils of the "intact" surface are predominantly deep, red and yellow earths. Red earths include Berrimah and Killuppa families which are deep, well drained loamy and sandy red earths respectively. They are both grave l-free and support a ta 11 op~en forest or tall woodland dominated by E. miniata, E. tetrodonta and E. nesophila. Often the understorey is characterised by Gronophy77um ramsayi (Kentia palm). Lower in topo graphy, yellow earths (Ramil famil y) occur. These soils are not as deep as the red earths, and have a mottled and gravelly layer usually occurring within 150cm from the surface. (This layer could represent the top of the mottl ed zone of a standard tri-zonal lateritic profile). Ramil soils generally support a more diverse range of vegetation species than the red earths. - 23