Letteratura scientifica selezionata sul tema "Soils South Australia Lofty, Mount, Ranges, Region"

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Articoli di riviste sul tema "Soils South Australia Lofty, Mount, Ranges, Region"

1

Fitzpatrick, R. W., J. W. Cox, B. Munday e J. F. Bourne. "Development of soil-landscape and vegetation indicators for managing waterlogged and saline catchments". Australian Journal of Experimental Agriculture 43, n. 3 (2003): 245. http://dx.doi.org/10.1071/ea00198.

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Abstract (sommario):
The objectives of this study were to develop a systematic approach to identify important soil morphological and vegetation field indicators to better target land management in degraded landscapes in a specific region. The authors were able to link the soil-landscape features to the main soil and water processes operating within the landscape. This information was used to develop a set of field indicators (e.g. soil colour) within a user-friendly soil classification key that is linked to land use options to form the basis of a manual. It was shown that information written in this format helped farmers and regional advisers to identify options for remediation of waterlogged and saline areas and to improve planning at property and catchment scales. The authors identified a series of steps to be taken in producing the manual. Steps 1–5 describe the soil layers and construct them in toposequences, which are then used to map soil types in key surrounding areas. Steps 6–9 involve the local community in developing the manual.The paper provides an account of how manuals have been produced for 2 badly degraded areas in southern Australia (Mount Lofty Ranges, South Australia; and western Victoria) and promotes the methodologies for other regions. Descriptive soil information is pictorially integrated along toposequences and applied to identify key soil features. Complex scientific processes and terminology are more simply communicated to local groups using coloured cross-sectional diagrams and photographs of soil and vegetation to overcome some of the perceived barriers to adoption of best management practices. We consider the approach should have generic application.
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2

Speight, Natasha, Daniel Colella, Wayne Boardman, David A. Taggart, Julie I. Haynes e William G. Breed. "Seasonal variation in occurrence of oxalate nephrosis in South Australian koalas (Phascolarctos cinereus)". Australian Mammalogy 41, n. 1 (2019): 92. http://dx.doi.org/10.1071/am17038.

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Abstract (sommario):
Many koalas (Phascolarctos cinereus) in the Mount Lofty Ranges, South Australia, are affected by oxalate nephrosis, in which renal calcium oxalate deposition occurs. In other species, suboptimal water intake increases the risk of urinary calcium oxalate crystal formation. Koalas principally rely on eucalypt leaf moisture content to maintain hydration but the Mount Lofty Ranges region has hot, dry summers. This study investigates the association between temperature, rainfall and eucalypt leaf moisture and the occurrence of oxalate nephrosis in this population of koalas. Koalas from the Mount Lofty Ranges population that had died or were euthanased between 2008 and 2016 were necropsied and oxalate nephrosis was determined by histopathology (n=50). Leaf moisture content of Mount Lofty eucalypts was determined seasonally. It was found that increased numbers of koalas with oxalate nephrosis died in the months following high mean maximal temperature and in the months following low rainfall. Eucalypt leaf moisture content was not significantly associated with koala deaths. These findings suggest that hot and dry summer/autumn periods contribute to an increased incidence of koala deaths due to oxalate nephrosis. This is probably due to the effects of evaporative water loss and/or lack of access to supplementary drinking water at this time.
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3

Merry, RH, KG Tiller e AF Richards. "Variability in characteristics of some acidic pasture soils in South Australia and implications for lime application". Soil Research 28, n. 1 (1990): 27. http://dx.doi.org/10.1071/sr9900027.

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Abstract (sommario):
The variability of soil pH (0.01 M CaCI2), aluminium and manganese (extractable in 0.01 M CaCl2), total carbon and some soil morphological factors have been investigated in the surface and subsoil at seven pasture sites in the southern Mount Lofty Ranges and Kangaroo Island, South Australia. The coefficients of variation of the factors measured were found to be of a similar order, except for soil pH which, being a logarithmic transformation, is much lower. Relationships between pH and soil aluminium, manganese and carbon are used to predict the effects of further acidification, especially with respect to the development of increased extractable aluminium, and to assess the likelihood of problems in selecting appropriate rates of lime application.
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4

Varcoe, Jon, John A. van Leeuwen, David J. Chittleborough, James W. Cox, Ronald J. Smernik e Anna Heitz. "Changes in water quality following gypsum application to catchment soils of the Mount Lofty Ranges, South Australia". Organic Geochemistry 41, n. 2 (febbraio 2010): 116–23. http://dx.doi.org/10.1016/j.orggeochem.2009.09.010.

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5

Fritsch, E., e RW Fitzpatrick. "Colour plates - Interpretation of soil features produced by ancient and modern processes in degraded landscapes .1. A new method for constructing conceptual soil-water-landscape models". Soil Research 32, n. 5 (1994): 880. http://dx.doi.org/10.1071/sr9940880.

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Abstract (sommario):
A pedo-hydrological method which involves interpreting features in soils that result from both ancient and modern processes along toposequences in a subcatchment of the Mt Lofty Ranges, South Australia, is used to construct conceptual soil-water-landscape models. This method links soil-landscape features to soil-water processes with strong emphasis on: (i) soil water-flow systems and (ii) soil-forming and soil-change processes. The conceptual model illustrates the interactions between soil processes acting in soil water-flow systems. This model is able to predict future modes of soil-landscape evolution under changing environmental conditions. As well, it may be used by land and water supply managers to develop more efficient management strategies under conditions of increasing land degradation (e.g. erosion and water pollution). A typical Palexeralf-Natraqualf hydro-toposequence of soils (i.e. catena consisting of red-yellow-grey duplex soils) is used as an example to illustrate this new approach. The landscape selected is undergoing severe soil degradation (i.e. waterlogging, dryland salinity, erosion and water pollution). The constructed conceptual soil-water-landscape model is the result of detailed pedo-hydrological investigations along toposequences in a representative subcatchment in the high rainfall zone (>600 mm) of the Mount Lofty Ranges, South Australia. The model illustrates in graphic form interactions between three soil water-flow systems (freely drained red soil system, hydromorphic topsoil system, hydromorphic subsoil system) and eight soil processes (saprolitization, ferralitization, glaebulization, redoximorphism, eluviation/illuviation, salinization/solonization, sulfidization/sulfuricization and water erosion). The study demonstrates that this whole ecosystem has been placed into disequilibrium thereby developing severe land degradation problems as a result of rising saline sulfatic ground watertables and perched watertables due to land-clearing since European settlement. The purpose of this paper is to provide a methodology framework and overall summary for other papers in a series dealing essentially with detailed field and laboratory investigations of individual soil-water processes.
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6

Fritsch, E., e RW Fitzpatrick. "Interpretation of soil features produced by ancient and modern processes in degraded landscapes .1. A new method for constructing conceptual soil-water-landscape models". Soil Research 32, n. 5 (1994): 889. http://dx.doi.org/10.1071/sr9940889.

Testo completo
Abstract (sommario):
A pedo-hydrological method which involves interpreting features in soils that result from both ancient and modern processes along toposequences in a subcatchment of the Mt Lofty Ranges, South Australia, is used to construct conceptual soil-water-landscape models. This method links soil-landscape features to soil-water processes with strong emphasis on: (i) soil water-flow systems and (ii) soil-forming and soil-change processes. The conceptual model illustrates the interactions between soil processes acting in soil water-flow systems. This model is able to predict future modes of soil-landscape evolution under changing environmental conditions. As well, it may be used by land and water supply managers to develop more efficient management strategies under conditions of increasing land degradation (e.g. erosion and water pollution). A typical Palexeralf-Natraqualf hydro-toposequence of soils (i.e. catena consisting of red-yellow-grey duplex soils) is used as an example to illustrate this new approach. The landscape selected is undergoing severe soil degradation (i.e. waterlogging, dryland salinity, erosion and water pollution). The constructed conceptual soil-water-landscape model is the result of detailed pedo-hydrological investigations along toposequences in a representative subcatchment in the high rainfall zone (>600 mm) of the Mount Lofty Ranges, South Australia. The model illustrates in graphic form interactions between three soil water-flow systems (freely drained red soil system, hydromorphic topsoil system, hydromorphic subsoil system) and eight soil processes (saprolitization, ferralitization, glaebulization, redoximorphism, eluviation/illuviation, salinization/solonization, sulfidization/sulfuricization and water erosion). The study demonstrates that this whole ecosystem has been placed into disequilibrium thereby developing severe land degradation problems as a result of rising saline sulfatic ground watertables and perched watertables due to land-clearing since European settlement. The purpose of this paper is to provide a methodology framework and overall summary for other papers in a series dealing essentially with detailed field and laboratory investigations of individual soil-water processes.
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7

Naidu, R., DR Williamson, RW Fitzpatrick e IO Hollingsworth. "Effect of landuse on the composition of throughflow water immediately above clayey B horizons in the Warren Catchment, South Australia". Australian Journal of Experimental Agriculture 33, n. 2 (1993): 239. http://dx.doi.org/10.1071/ea9930239.

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Abstract (sommario):
The effect of landuse on composition of throughflow water immediately above the clayey B horizons in duplex soils (mostly natric and/or sodic) in the Mount Lofty Ranges, South Australia, was investigated using simple lysimeters. During July-November 1991, the pH of the first flow immediately after rainstorm under pines, native woodland, and pasture, respectively, was 5.7, 6.0, and 6.4. At each of the sites, average pH over 4 months during July-November was 5.8-5.9. Both the electrical conductivity (EC) and the amounts of total dissolved solids (TDS) were 2-3 times higher under pine than at other sites. The rate of change in EC with respect to TDS varied considerably among the sites, possibly due to the large differences in the concentration of dissolved organic compounds. Although the pH of water was >5.5, both aluminium and iron were recorded, especially under pine, where there were also high levels of dissolved organic compounds. High levels of suspended colloidal matter were recorded in the water flowing under pine, and these levels were related to dissolved organic carbon.
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8

Biddle, DL, DJ Chittleborough e RW Fitzpatrick. "Field-based comparison of platinum and wax impregnated graphite redox electrodes". Soil Research 33, n. 3 (1995): 415. http://dx.doi.org/10.1071/sr9950415.

Testo completo
Abstract (sommario):
An inert electrode was constructed using wax-impregnated graphite (WIG) as an alternative to Pt for permanent installation in the regolith. The performance of WIG electrodes has not previously been systematically evaluated by using data from field trials, although Pt and WIG measure similar Eh values in laboratory solutions. We compared the performance of the WIG electrode when installed adjacent to Pt redox electrodes in the A, B and C horizons of duplex soils in a X-eralf-Aqualf toposequence near Mount Crawford in the Mt Lofty Ranges, South Australia. Lower potentials, commonly in the order of 200 mV, were measured from WIG electrodes, relative to Pt electrodes. Measurements of potential from adjacently installed WIG and Pt electrodes did not show significant correlation. Generally oxidizing redox potentials were measured in all soils in which electrodes were installed due to below average rainfall during the sampling period. Further testing of WIG electrodes in reduced regolith is needed. Interpretation of Eh trends, measured using Pt electrodes, between the A, B and C horizon are presented.
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9

BAKER, G. H., V. J. BARRETT, R. GREY-GARDNER e J. C. BUCKERFIELD. "The life history and abundance of the introduced earthworms Aporrectodea trapezoides and A. caliginosa (Annelida: Lumbricidae) in pasture soils in the Mount Lofty Ranges, South Australia". Austral Ecology 17, n. 2 (giugno 1992): 177–88. http://dx.doi.org/10.1111/j.1442-9993.1992.tb00796.x.

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10

Granger, AR, e DRC Traeger. "Effect of different rates and timing of soil applications of paclobutrazol on the growth of sweet cherries (Prunus avium L.)". Australian Journal of Experimental Agriculture 33, n. 2 (1993): 207. http://dx.doi.org/10.1071/ea9930207.

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Abstract (sommario):
The response of sweet cherry trees (butt circumference, canopy volume, yield) to different rates of the growth-inhibiting chemical paclobutrazol applied at various times during each year was studied on red podsolic soils in the Mount Lofty Ranges of South Australia Two experiments were conducted: one used a regression design with 16 rates of paclobutrazol; the other was a randomised block experiment with paclobutrazol treatments applied in spring, autumn, or half in autumn and half in spring. Butt circumference growth of the variety Sam grafted on Mahaleb rootstocks tended to reduce with inceased rates of paclobutrazol in the first year of application. The lowest rate of paclobutrazol to reduce butt growth sigdicantly below that of control trees was 1.2 g a.i./tree. Canopy growth showed a delayed response in measurable growth inhibition in the season after treatment; however, no significant differences were measured for rate of canopy growth in any year for any treatment in the regression experiment. Despite this, final canopy volumes of trees treated with 1.6 g paclobutrazol in spring were half those of control canopies. Variability in butt growth response to the range of rates applied was attributed largely to localised differences in soil properties which influenced paclobutrazol movement and uptake. This variability was gradually reduced over the 3-year period with continued paclobutrazol applications. In 1987, crop level ratings made before harvest showed significantly higher levels of fruit on trees treated with 1.6 g paclobutrazol in spring, indicating that fruit numbers could be increased by applications of paclobutrazol.
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Tesi sul tema "Soils South Australia Lofty, Mount, Ranges, Region"

1

Nathan, Muhammad. "Clay movement in a saline-sodic soil toposequence". Title page, contents and summary only, 2001. http://web4.library.adelaide.edu.au/theses/09A/09an274.pdf.

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Abstract (sommario):
Includes bibliographical references (leaves 78-86) In the Herrmanns sub-catchment in the Mt. Lofty Ranges (near Mt. Torrens) soil sodicity was the dominant factor in causing clay to disperse in the eroded area along the foot slopes, wheras in non-eroded areas of the mid-slopes and on the stream banks, the dispersive power of sodicity was attenuated by the flocculative power of other soil properties.
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2

Layton, Ronald A. "Sustainability issues in the Central Mount Lofty Ranges". Title page, table of contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09ENV/09envl429.pdf.

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Abstract (sommario):
Bibliography: leaves 78-83. "The dissertation brings together discourses relating to sustainability with that of the environment, at least in terms of its meaning and responses to it being culturally constructed. The Central Adelaide Hills provides the locality for achieving this, which a peri-urban environment is subject to the power exerted by urban Adelaide as well as the tension arising out of land use conflict and attitudes to the environment."
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3

Nathan, Muhammad. "Clay movement in a saline-sodic soil toposequence". Thesis, 2001. http://hdl.handle.net/2440/109032.

Testo completo
Abstract (sommario):
In the Herrmanns sub-catchment in the Mt. Lofty Ranges (near Mt. Torrens) soil sodicity was the dominant factor in causing clay to disperse in the eroded area along the foot slopes, wheras in non-eroded areas of the mid-slopes and on the stream banks, the dispersive power of sodicity was attenuated by the flocculative power of other soil properties.
Thesis (M.Ag.Sc.) -- University of Adelaide, Dept. of Soil and Water, 2002
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4

Thomas, Mark. "Multiscale prediction of saline-sodic land degradation processes in two South Australian regions". 2007. http://hdl.handle.net/2440/57337.

Testo completo
Abstract (sommario):
Title page, table of contents and abstract only. The complete thesis in print form is available from the University of Adelaide Library.
In this thesis, the distribution of saline-sodic properties forming part of a complex pattern of soils in two varied upland agricultural regions in South Asutralia were predicted at multiple scales using DSM and allied approaches.
http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1283986
Thesis (Ph.D.) -- University of Adelaide, School of Earth and Environmental Sciences, 2007
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5

Thomas, Mark. "Multiscale prediction of saline-sodic land degradation processes in two South Australian regions". Thesis, 2007. http://hdl.handle.net/2440/57337.

Testo completo
Abstract (sommario):
In this thesis, the distribution of saline-sodic properties forming part of a complex pattern of soils in two varied upland agricultural regions in South Asutralia were predicted at multiple scales using DSM and allied approaches.
Thesis (Ph.D.) -- University of Adelaide, School of Earth and Environmental Sciences, 2007
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