Territory Stories

Report on the land units of selected areas of Manbulloo Station, N.T., 1976



Report on the land units of selected areas of Manbulloo Station, N.T., 1976

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by C.R. Gibbs, M.R. Wells & H.R.M. van-Cuylenburg.


Gibbs, C. R.; Wells, M. R.; Australia. Dept. of the Northern Territory. Land Conservation Section; Van-Cuylenburg, H. R. M.


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Made available via the Publications (Legal Deposit) Act 2004 (NT).; Supplementary report to be used in conjunction with the Report on the land units of the Katherine-Douglas area, N.T., 1970, by J.M. Aldrick.


Date:1977; Bibliography: leaf 49.




Land use -- Northern Territory -- Manbulloo Station

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Land Conservation Section

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60 leaves : ill., maps ; 30 cm.

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3. DEVELOPMENTAL LIMITATIONS AND POTENTIAL LAND USE In defining and mapping the land units of the Katherine-Douglas area Aldrick and Robinson endeavoured to place objective limitations ratings on each unit, and by reference to these limitations propose a suitable land use for each unit. Both the limitations and the proposed forms of land use are applicable to the land units of the Manbulloo area. The limitations that have been considered are relief and microrelief, soil depth, gravel content, stoniness, presence of rock and stone, erodibility, subsceptibility to flooding or inundation, drainage, permeability, available soil water storage capacity, topsoil consistency, soil reaction, clearing difficulty and weediness. Because many of these limitations interact the dominant limitation is frequently the only one mentioned in the land unit description. For example in rugged areas where severe rock, erodibility and soil depth limitations occur, the severe relief limitation overides all others. A description of the resources and inherent limitations of each land unit provides a factual basis on which an assessment of the agricultural capability of an area can be made. The term "land category" refers to this assessment. The land categorisation* used herein was developed by Aldrick and Robinson with present agricultural and pastoral management systems in mind. The land categories 1-8 are briefly: (1) Arable with only slight limitations suitable for cash crops (2) Arable with moderate limitations suitable for cash crops (3) Arable with definite limitations more suitable for fodder crops than cash crops (4) Marginally arable with serious limitations more suitable for improved pasture (5) Non arable suitable for permanent improved pasture (6) Non arable marginally improvable grazing land (7) Unimprovable rough grazing land (8) Land unsuitable for pastoral production. The extrapolation of these subjective capability assessments from the Katherine-Douglas to the Manbulloo area is generally valid since both areas lie within the same drainage baisn and possess similar geological and geomorphological features. * based on the U.S.D.A. system. -6

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