Journal articles on the topic 'Mt Lofty Ranges'

The effects of nitrogen (N) fertiliser (0–200 kg/ha) on mass, botanical composition, and N concentration (%) in herbage were examined in nine 2- or 3-year rate × time of application experiments, 14 single-year annual rate of application experiments and 15 short-term spring rate of application experiments, at 27 sites in the Mt Lofty Ranges, South Australia, in 7 years between 1970 and 1979, inclusive. Effects on in vitro digestibility and concentrations of other nutrients in herbage were examined in selected experiments.Annual applications of 200 kg N/ha increased herbage mass by an average of 2.8 t/ha (57% increase), over the average yield of unfertilised pasture of 4.6 t/ha. Subterranean clover was eliminated from the sward with this rate of N application, although this may have been exacerbated by the experimental methods used. N fertiliser application increased herbage mass throughout the growing season, except in autumn 1972 when low rainfall restricted growth and about half of the experiments were not harvested. In 5 of the 126 individual harvests, herbage mass did not respond positively to N fertiliser applications, even though clover composition of herbage declined.A single application of 50 kg N/ha in autumn increased herbage mass, 6–8 weeks later, by an average 11�kg�DM/kg N, but this N effect only persisted to a subsequent harvest in about half of the experiments, with an average residual effect of 25%. Commonly, a response to N fertiliser in the first and/or second harvests was followed by a non-responsive period and then a depression in herbage mass, where no further N fertiliser was applied. With repeated N fertiliser applications, the average responses to 50� kg� N/ha were 11 kg DM/kg N in late winter and also in early spring, similar to the autumn response, and 18�kg�DM/kg N in late spring. In a later study, a single application of 50 kg N/ha in spring, for silage or hay conservation, increased herbage mass by an average of 1.3 t/ha in late spring while the average response to 100 kg N/ha was 2.0 t/ha. Clover composition declined but was rarely eliminated from the sward by these N rates when applied only in spring.From early winter to early spring, N concentration in herbage from unfertilised pasture ranged from 3 to 4% N and then progressively declined. Relationships between herbage N concentrations and increasing N rates were either linear or curvilinear in early and late winter, whereas in spring, many of these responses to N fertiliser were sigmoidal, with a decline in herbage N concentrations being observed at low N rates. Nitrogen fertiliser applied throughout the growing season had little effect on in vitro digestibility for a wide range of pasture compositions. However, in vitro digestibility of a pure grass pasture was increased early in the growing season by applications up to 50 kg N/ha, but was depressed by the same N rates applied in late spring. Consistently, an increase in N had the following effect on the concentration of other herbage nutrients: K�increased; Ca decreased becoming more pronounced as the growing season progressed; P decreased in late spring; and Cu fell in autumn. The content of these nutrients in harvested herbage usually increased with increasing N rate, particularly when associated with large herbage mass responses to N fertiliser. The K : (Ca + Mg) ratio in herbage, a criterion for grass tetany, increased detrimentally with increasing N rate. Strategies are proposed for using N fertiliser on rain-fed pasture in the Mt Lofty Ranges.

Charles Albert Edward Fenner (1884?1955) was educated in Melbourne but spent the major part of his working life in South Australia, first as Superintendent of Technical Education and later as Director of Education, holding the latter post during the difficult years of the Second World War. He is best remembered for his role in the establishment of Geography as a university discipline and for his landform studies. He brought together earlier work on the tectonics of the Gulfs region of South Australia and introduced the term ?shatter belt' to describe the complex of horsts and sunken blocks. He noted evidence pointing to recent and continuing earth movements, and suggested that such earth movements were responsible for the westerly diversion of the River Murray at Chucka Bend. He also conceived a hypothesis of ?double planation' in explanation of the morphology of the Mt Lofty Ranges.

Genetic variation among the principal members of the white-browed scrubwren (Sericornis frontalis) complex was assessed by protein electrophoresis. A total of 31 enzyme systems, representing 49 presumptive loci, was screened electrophoretically and analysed by conventional genetic distance measures. Differentiation equivalent to species level was recorded between the Tasmanian form humilis and allotaxa on the Australian mainland. Among mainland forms (laevigaster in the north-east, nominotypical frontalis in the south-east and maculatus in the south-west) differentiation was at a much lower order, equivalent to that between subspecies. The small sample of frontalis isolated in the Mt Lofty Ranges (rosinae), nevertheless, exhibited marked divergence in proteins. Changes in alleles at the aldolase locus confirm that laevigaster and nominotypical frontalis intergrade secondarily, but between 27-degrees-S. (Brisbane-Dalby) and 23-degrees-S. (Rockhampton-Emerald), well to the north of previously postulated zones of introgression.

Five new species are described in the genus Yoyetta Moulds, each belonging to the Yoyetta tristrigata (Goding and Froggatt) species group. Yoyetta australicta n. sp. occurs in southern eucalypt woodlands in two separate populations, one extending from the foothills of the Mt Lofty Ranges and southern fringes of Adelaide north to the Flinders Ranges, and the other from Warrumbungle National Park and from Clandulla, near Orange and near Grenfell in New South Wales south to Mt Taylor in the Australian Capital Territory. Yoyetta corindi n. sp. has a restricted, coastal and subcoastal warm temperate distribution in north-eastern New South Wales open forest communities between Trustums Hill and Arrawarra, extending inland from south-west of Grafton to Tyringham. Yoyetta delicata n. sp. has an inland warm temperate distribution in eucalypt woodland and open forest from near Killarney and west of Warwick in south-east Queensland south to Cassilis and near Wyong in central New South Wales. Yoyetta ignita n. sp. is found from Flinders Peak and Mt Tamborine in south-east Queensland, south along the Great Dividing Range (and inland to Mt Kaputar) in New South Wales, with a disjunct population on the eastern slopes of Mt Ainslie in the Australian Capital Territory. Yoyetta robusta n. sp. is found from the Granite Belt in south-east Queensland south to the Glenn Innes area in northern New South Wales. The new species are all small–medium sized cicadas (15–25 mm body length) with male calling songs that are distinguishable from one another and from other species in the genus. In three of the new species (Y. australicta n. sp., Y. corindi n. sp. and Y. robusta n. sp.), the songs are characterised by sharp, high energy ticks or clicks, produced mainly in flight. Each of these species also produces ticks or clicks, sometimes in combination with a short buzz, while stationary. Of the remaining two species, one (Y. delicata n. sp.) produces a soft, coarse buzzing song while stationary and the other (Y. ignita n. sp.) produces a combination of buzzes and clicks while stationary. A key to species in the Y. tristrigata species group is provided.

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.

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.

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.

Dissolved organic carbon (DOC) is of major importance for freshwater ecology and water treatment, particularly in Australia. Work comparing two small catchments, one yielding water with high DOC concentrations (Lawless) and the other yielding water with low DOC concentrations (Retreat Valley), is described. Differences between stream DOC concentrations in the two catchments were related to differences between the properties of the catchment soils. The Retreat Valley soils had higher C contents than the Lawless soils, but the C was less soluble, resulting in lower DOC concentrations in soil core leachates. The lower solubility of C in the Retreat Valley soils was the result of a higher clay content and hence a higher surface area for adsorption reactions. The Retreat Valley soils had a higher adsorption capacity for organic matter than did the Lawless soils. The clay contents of soils was found to be an important factor influencing stream DOC concentrations throughout the Mt Lofty Ranges, and the prediction of DOC concentrations in streams on a broad scale is discussed.

Water relations of feral olives (Olea europaea L.) were studied on a location in the Mt Lofty Ranges, South Australia. In spring (October–November), 6 months before the study commenced, an area of trees had been cut back to stumps as part of an eradication project. The stumps resprouted vigorously over summer, similarly to regrowth seen following wildfire. The following autumn and winter, plant water potentials and soil matric potentials were measured on the cut trees and adjacent control trees, to determine whether the cut trees were better hydrated due to the pruning treatment. In autumn, before the winter rains began, the resprouting trees were more hydrated than the control trees, with a difference in predawn water potentials of between 2 and 4 MPa, and 1.5 MPa or greater throughout the day. The soil matric potential was much less negative on the cleared site, both at the surface and at 50-cm depth, indicating that soil water had been less depleted by the cut trees than by the intact trees. This improved hydration was similar to that reported for sclerophyll vegetation after defoliation by fire. Results have some significance for feral olive eradication projects.

Leaf (xylem) water potentials were measured in summer and autumn on four species, Eucalyptus fasciculosa, Pultenaea daphnoides, Platylobium obtusangulum and Acacia myrtifolia growing in the understorey of sclerophyll stringybark vegetation in the Mt Lofty Ranges, South Australia. Plants regenerating in an area burnt by bushfire 2 years previously were compared with plants in an adjacent unburnt area. The Acacia was killed by fire and subsequently regenerated from seed. The other three species survived and resprouted from basal or epicormic buds. It was expected that shrubs regenerating from basal buds would be better hydrated in summer, as a large intact root system would supply a reduced canopy, and that seedlings, with smaller root systems than unburnt adults, would be more stressed. The Acacia was indeed significantly more stressed during summer in the burnt area. However the Platylobium was also more stressed than the controls, while the Pultenaea showed no significant differences between burnt and control areas. The Eucalyptus showed no differences between sites, nor between any of the three sampling times. The more negative water potentials of some of the regenerating plants are explained by greater exposure of surface soil on the burnt site, leading to more rapid drying of the surface soil in summer.

Rising saline groundwater and fresh perched water have increased over 120 years (modern processes) in the Mediterranean region (>600 mm per annum) of the Mt Lofty Ranges, South Australia. This was caused by replacement of native vegetation with pastures which use less water. Relationships between morphological features (mainly soil colour) and field measurements (e.g. watertable duration, salinity, and sodicity) were studied to 3 m at 12 sites down a representative toposequence of red-yellow-grey duplex soils (Palexeralfs-Natraqualfs), which are common from crest to flat in these catchments. Three soil systems were identified from groupings of soil features: (i) brown/grey topsoil system (e.g. A and E horizons), (ii) red subsoil system (e.g. Bt), and (iii) yellow/white subsoil system (e.g. Btng or Cg). A water duration index was developed to quantify water duration in the brown/grey topsoil system from perched water levels measured in 12 dipwells installed to 0.5 m. Nested piezometers were used to determine if unsaturated zones occurred within the subsoil systems. Measured water duration and levels were compared with the presence pr absence of inferred redoximorphic features. Most features in the brown/grey topsoil system and the red and yellow/white subsoil systems reflected differences in water duration. A conceptual model was constructed to match successive changes in hydrology with differences in soil morphology and thus distinguish between modern and relict (late Mesozoic) soil features that developed under past and present hydrological conditions.

Two series of experiments were conducted in the Mt Lofty Ranges, South Australia, to examine, in a grass–subterranean clover pasture, the contribution of the companion grass to herbage mass and the responsiveness to the application of nitrogen (N) fertiliser. The first study examined the responsiveness, to a single rate of N, of grass–clover pastures containing either Tama ryegrass, sod-sown oats or 1 of 4 perennial grasses, viz. Victorian perennial ryegrass, Demeter fescue, Currie cocksfoot or Australian phalaris. These were compared in 2 experiments, under 3��different cutting frequencies at 3 periods during the growing season. In the other study, consisting of 12�experiments, the response to increasing rate of N fertiliser application of sod-sown oats or the existing pasture were compared over a 3-month period following N fertiliser application in autumn.In autumn and winter, all pastures responded significantly to N fertiliser, whereas in spring, the proportion of clover in each pasture and its growth determined whether or not there was a response to N fertiliser. Clover composition of pastures declined with N application, but clover was not eliminated from swards by application of 210 kg N/ha a year. In both series of experiments, pastures that established well with a high density of sod-sown oats out-yielded all other pastures in autumn and winter, whether the swards were unfertilised or received regular N fertiliser applications. In late winter, pastures sod-sown with Tama ryegrass yielded as well as the pasture sod-sown with oats, and enhanced spring growth significantly compared with perennial ryegrass. However, spring production of Tama ryegrass was poorer than that of perennial ryegrass, and overall no increase in annual production occurred. Of the perennial grasses, the highest yielding when N fertiliser was applied were Currie cocksfoot and perennial ryegrass (yielding in autumn), phalaris (winter), and perennial ryegrass and Demeter fescue (spring). Increased cutting frequency depressed the herbage mass response to N fertiliser following the initial application, but increased herbage N concentration of all pastures and also increased the final clover composition of N-fertilised pasture of 4�pasture types.

Autecological data were collected on southern populations of the yellow-footed antechinus (Antechinus flavipes), during a wider study on the persistence of this species in a highly fragmented landscape of the southern Mt Lofty Ranges, South Australia. Data are presented to provide information on this species in the southern part of its range, to present a comparison with populations in other, more northern regions, and to provide an insight into the species' persistence in a fragmented system. Resulting recapture rates lend support to the presence of a male-biased dispersal strategy, which is the first published indication of such a strategy for the species. New information was also recorded for nest sites, with most sites occurring in tall Xanthorrhoea semiplana tateana, and only 33% found in tree cavities. Other results showed mostly comparable population densities and weights with other, more northern populations. However, differences were apparent with respect to juvenile dispersal behaviour and, to some extent, breeding times. Within-study populations also showed variation with regard to weights, density and breeding times. Forest animals were lighter, were largely of lower population densities, and were generally later breeders than animals that inhabited patches and strips of remnant vegetation. Such differences in weight and density may have been due to favourable 'edge effects' in patches and strips, while variations in breeding times may be due to local climatic or habitat factors. The life-history strategies and tolerance of habitat edges shown by A.�flavipes (presently and historically) provide some explanation for the species' persistence in this fragmented system.

Ameliorative strategies are urgently required in some agricultural catchments in southern Australia to reduce the loss of potential contaminants to streams. However, a better understanding of where the contaminants are generated on hillslopes, their forms, and the pathways through which they are transported were required. Thus, seasonal changes in the quantities and forms of several chemical species were measured in both vertical and lateral flow pathways at 4 sites along a toposequence in the Mt Lofty Ranges, South Australia. Instrumentation was installed to measure and quantify overland flow and throughflow, and porous-wick samplers were installed at 2 depths to study the chemistry of leachate. Neutron moisture meter access tubes were installed to measure seasonal changes in soil water content with depth as this influences chemical concentrations and mobility. In years of average to below average annual rainfall, throughflow was the most important transport pathway for contaminants. However, it was expected that overland flow will be the dominant transport pathway when annual rainfall is above about 550 mm. Changes in water content of the texture-contrast soils was caused by seasonal rainfall causing periodic saturation, by waterlogging, groundwater, or both. This affected the type and form of contaminant. For example, Na and Cl concentrations were generally only large (800 and 1500 mg/L, respectively) on the lower slopes but in the wettest seasons their concentrations increased at depth on mid-slopes due to the influence of shallow saline groundwater. These chemicals then leached when groundwater levels subsided. The results suggest that ameliorative strategies to reduce agricultural contaminants should target the transport pathways specific to each chemical species, at the point (or points) in the landscape where they are generated.

This study was conducted to assess the effects of nitrogen (N) and potassium (K) on the yield and size distribution of Brussels sprouts (Brassica oleracea L. var. gemmifera) grown with sprinkler irrigation in the Mt Lofty Ranges, South Australia. The cultivars grown were Oliver and Roger which are early and mid season types, respectively. Yields of swollen axillary buds or Brussels sprouts were assessed over 4-7 harvests. Five rates of N (0, 125, 250, 375, 600 kg/ha) with 3 rates of K (0, 150, 300 kg/ha) were applied over 8 side-dressings during the 7-8-month cropping period in randomised block experiments. Four experiments were conducted during 1992-93 (sites 1 and 2) and 1993-94 (sites 3 and 4) on silty loam, loam and sandy loam soils. The effect of N and K on sprout colour was determined at sites 3 and 4. Thiocyanate concentrations in sprouts and the bitterness of sprouts, from the nil and highest K treatment, and from plants in the crop adjacent to the experimental area, were determined for sites 1 and 2. In 3 of the 4 experiments, applied N significantly (P<0.001) increased total yield of sprouts harvested. Yield increases due to applied N ranged from 51 to 78%. At site 1 (cv. Oliver), there was no yield response to applied N but at sites 2 and 4 (cv. Roger) and site 3 (cv. Oliver), 319, 377 and 383 kg N/ha, respectively were required for 95% maximum yield. At responsive sites, application of N significantly increased both yield of sprouts at all harvests except harvest 1, and yield of 20-<30 and 30-<40 g sprouts, which are the preferred size ranges. Increasing rates of N significantly (P<0.05) increased yield of 240 g or large sprouts at all 3 responsive sites. The effect of applied N on sprout colour was inconsistent. At site 4, application of N significantly (P<0.001) increased the mean colour rating of sprouts, in contrast, at site 3 the effect was not significant (P>0.05). At both sites, mean colour ratings decreased during the harvest period irrespective of N applied. Total yield, size and colour of sprouts were not significantly (P>0.05) affected by rate of applied K at any site. It was concluded that extractable K concentrations of 140-260 mg/kg in the surface (0-15 cm) soils were adequate and not limiting yield. At site 1, thiocyanate concentration in sprouts and sprout bitterness increased significantly (P<0.001) when the highest rate of K2SO4 was applied. At site 2, which had received higher rates of sulfate-based fertilisers in previous years, the effect was not significant (P>0.05). This finding suggests that application of high rates of K2SO4 to Brussels sprouts should be avoided to ensure bitterness does not adversely affect the marketability of sprouts.

Five field experiments were conducted over 3 years in the Mt Lofty Ranges (4 sites) and the Upper South East (1 site) to examine the significance of main effects and interactions between nitrogen (N, up to 360 kg N/ha), phosphorus (P, up to 320 kg P/ha), and potassium (K, up to 480 kg K/ha) on total yield, yield of 80-350 g size grade, specific gravity, crisp colour, and chemical composition of tubers of potato cv. Kennebec. There were significant (P<0.05) main effects of increasing rates of applied N on total tuber yield and yield of 80-350 g tubers at 2 of the 5 experimental sites; the effect of applied P was significant at 3 sites, and applied K also at 3 sites. Application of N, P, and K increased total tuber yield by 13-432%, 19-145%, and 19-89%, respectively, at responsive sites. Increases in the yield of 80-350 g tubers were similar to those for total yield. There were significant first-order interactions (N x K, N x P, K x P) at 2 sites. The interactions were (i) response to the application of 1 nutrient limited by suboptimal rates of another; and (ii) yield depression, due to high rates of 1 or more nutrients. Nitrogen and P increased specific gravity at only 1 of the sites where they were applied. Potassium increased specific gravity at 1 site but decreased it at another. There were significant N x K, N x P, and K x P interactions at 2 sites. Vascular ring colour index (CI) and medulla CI were significantly (P<0.05) affected by rates of applied N, P, and K at 1, 3, and 4 experimental sites, respectively. Application of K (up to 480 kg K/ha) decreased vascular ring CI and medulla CI. Application of P increased the colour indices; for example, increasing the rate of P from nil to 160 kg/ha increased mean (� s.e.) vascular ring CI from 51 � 18 to 117 � 17. No interactions between N, P, and K in their effects on medulla CI were significant. For vascular ring CI, significant first-order interactions (K x N, K x P) were observed at 2 sites, at which application of N and P at nil K significantly increased vascular ring CI. At 240 or 480 kg K/ha, there was no change. Significant (P<0.001) curvilinear relationships were found between specific gravity and the concentrations of N, P, and K in the stem-end region of tubers; the coefficients of determination (r2) were 0.27, 0.62, and 0.76, respectively. For the combined medulla CI and vascular ring CI data, the corresponding values were 0.19 (P<0.001), 0.29 (P<0.001), and 0.05 (n.s.), respectively.

Four field experiments were conducted over 2 years on coarse grain siliceous sands in the Mt Lofty Ranges (3 sites) and Lower South East (1 site) to examine the effect of different rates of applied nitrogen (up to 320 kg N/ha) on the size, specific gravity, crisp colour and reducing sugar concentration of potato tubers of the cv. Kennebec. As the rate of applied nitrogen (N) was increased, there was a significant (P<0.05) increase in the yield of 80-350 and >350 g tubers. Rate of applied N did not significantly affect the yield of <80 g tubers. Highest yields of >350 g (large) tubers occurred at N rates in the range 160-320 kg N/ha. In contrast, the yield of 80-350 g tubers (preferred size for crisping), for the 80-120 kg N/ha sates, was not significantly different from the maximum yield of 80-350 g tubers for each site. At all sites, total tuber yields for the 80-120 kg N/ha rates were not significantly different from maximum yields. The effect of applied N on specific gravity (SG) was significant; the magnitude of the effect varied between sites. For the pooled data from all sites, correlation between SG and nitrate-N concentration in the petioles of youngest fully expanded leaves (P-YFEL) were not significant, however, there were significant correlations between the reduction in SG and petiole nitrate-N concentration. When tlie lengths of the largest tubers were <2 mm. 25 mm and 50 mm, reductions in SG of less than 0.0025 occurred when the P-YFEL nitrate-N concentrations were 1.70-2.50%, 0.70-2.00% and 0.25-1.25%, respectively. Tuber SG increased slightly after storage for 2 and 4 months but the changes were not related to the rate of applied N. There were no consistent trends between sites in vascular ring colour index (CI) and medulla CI, determined after 0, 2 and 4 months storage, as the rate of applied N increased. However, significant (P<0.05) changes in vascular ring and medulla CI did occur during storage, with significant reductions in medulla CI for 3 of the 4 sites. For all sites, vascular ring CI was highest after 2 months storage. Reducing sugar concentration of tubers was significantly affected by the rate of applied N at 2 sites. Tubers from all sites also showed significant changes in seducing sugar concentration during storage. Maximum reducing sugar concentrations (up to 0.23% fresh weight) occurred after 2 months storage. Coefficients of determination (r2 ) for the relationships between reducing sugar concentration and vascular ring and medulla CI were in the range 0.001-0.37. Based on data for 3 of the 4 sites, mean weight loss for tubers after 4 months storage was 6.6% and weight loss was not affected by the rate of applied N. Based on our data for the cv. Kennebec grown on siliceous sands, we suggest growers should use N fertiliser rates which are just sufficient to ensure that N is not limiting yield. This practice should result in acceptable tuber size, SG and crisp colour, even after the tubers have been stored for up to 4 months.

Four field experiments were carried out during 1992-93 (sites 1 and 2) and 1993-94 (sites 3 and 4) to assess the effects of nitrogen (N), at rates up to 600 kgha, and potassium (K), at rates up to 300 kgha, on total N, nitrate-N and K concentrations in petioles of the youngest fully expanded leaves (P-YFEL) of Brussels sprouts (Brassica oleracea var. gemmifera). The experiments were located in commercial plantings in the Mt Lofty Ranges, South Australia. Plant samples were collected at 2-4-week intervals from 4 to 28 weeks after the plants were transplanted. Temporal or seasonal variation, and the effects on concentrations of total N, nitrate-N and K of sampling leaves next in age (YFEL-1 to YFEL+2) to the index leaf, were also studied. Total N concentration in P-YFEL was more sensitive to variations in N supply than nitrate-N at all sites. Total N and nitrate-N concentrations in petioles also varied with the age of the leaf sampled. Total N concentrations in petioles of leaves sampled 4-16 weeks after transplanting decreased with increasing leaf age. In contrast, nitrate-N concentrations in petioles sampled 4-8 weeks after transplanting increased with leaf age. Potassium concentrations in petioles did not vary consistently between leaves of different age. From 4 to 6 weeks after transplanting, relationships between total N or nitrate-N concentrations in P-YFEL and relative total yield were not significant (P>0.05), therefore, critical concentrations could not be determined. Linear and quadratic models were used to study the relationships between total N and nitrate-N concentration in P-YFEL and relative total yield during 8-28 weeks after transplanting. Total N concentrations accounted for a greater amount of variation in relative total yield at 10, 12, 14, 16, 18, 20, 24 and 28 weeks after transplanting compared with nitrate-N. Coefficients of determination (r2) were in the range 0.52-0.93. Relationships between nitrate-N concentration in P-YFEL and relative total yield were only significant 8, 10, 14 and 16 weeks after transplanting and 9 values were in the range 0.49-0.82. Critical concentrations for total N decreased from 3.13-3.44% at 10 weeks to 1.22-1.38% at 28 weeks after transplanting. This decrease highlights the importance of carefully defining sampling time to ensure correct interpretation of plant test data. Potassium concentrations also decreased between 4 and 28 weeks after transplanting. Critical concentrations were not determined for K, because the crops at all sites did not respond significantly (P>0.05) to applied K. Based on sensitivity (as indicated by the range in tissue concentrations in response to variations in N supply) and on the correlations between total N and nitrate-N concentrations and relative total yield, we concluded that total N was better than nitrate-N as an indicator of plant N status and yield response of Brussels sprouts. We suggested that growers sample P-YFEL several times during the growing season, starting 10 weeks after transplanting. Plant analysis can be used to monitor N status and to detect N deficiencies which may arise during the growing season of Brussels sprouts which may be up to 9 months duration. Growers can adjust their fertiliser N program to ensure deficiencies are quickly corrected.

The antiquity of the Australian landscape has long been the subject of debate, with some studies inferring extraordinary longevity (>108 myr) for some subaerial landforms dating back to the early Paleozoic. A number of early Permian glacial erosion surfaces in the Fleurieu Peninsula, southeastern Australia, provide an opportunity to test the notion of long-term subaerial emergence, and thus tectonic and geomorphic stability, of parts of the Australian continent. Here we present results of apatite fission track analysis (AFTA) applied to a suite of samples collected from localities where glacial erosion features of early Permian age are developed. Our synthesis of AFTA results with geological data reveals four cooling episodes (C1-4), which are interpreted to represent distinct stages of exhumation. These episodes occurred during the Ediacaran to Ordovician (C1), mid-Carboniferous (C2), Permian to mid-Triassic (C3) and Eocene to Oligocene (C4).The interpretation of AFTA results indicates that the Neoproterozoic−Lower Paleozoic metasedimentary rocks and granitic intrusions upon which the glacial rock surfaces generally occur were exhumed to the surface by the latest Carboniferous−earliest Permian during episodes C2 and/or C3, possibly as a far-field response to the intraplate Alice Springs Orogeny. The resulting landscapes were sculpted by glacial erosive processes. Our interpretation of AFTA results suggests that the erosion surfaces and overlying Permian sedimentary rocks were subsequently heated to between c. 60 and 80°C, which we interpret as recording burial by a sedimentary cover comprising Permian and younger strata, roughly 1 km in thickness. This interpretation is consistent with existing thermochronological datasets from this region, and also with palynological and geochronological datasets from sediments in offshore Mesozoic−Cenozoic-age basins along the southern Australian margin that indicate substantial recycling of Permian−Cretaceous sediments. We propose that the exhumation which led to the contemporary exposure of the glacial erosion features began during the Eocene to Oligocene (episode C4), during the initial stages of intraplate deformation that has shaped the Mt Lofty and Flinders Ranges in South Australia. Our findings are consistent with several recent studies, which suggest that burial and exhumation have played a key role in the preservation and contemporary re-exposure of Gondwanan geomorphic features in the Australian landscape.

In this article I discuss a story told by the South Australian Ngarrindjeri Aboriginal elder, Aunty Hilda Wilson (nee Varcoe), about the time when, at not quite sixteen, she was sent from the Point Pearce Aboriginal Station to work in the Adelaide Hills, some 500 kilometres away, as a housekeeper for “one of Adelaide’s leading doctors”. Her secondment was part of a widespread practice in early and mid-twentieth century Australia of placing young Aboriginal women “of marriageable age” from missions and government reserves into domestic service. Consciously deploying Indigenous storytelling practices as pedagogy, Hilda Wilson recounted this episode in a number of distinct ways during the late 1990s and early 2000s. Across these iterations, each building on the other, she exhibited a personal resilience in her subjectivity, embedded in Indigenous knowledge systems of relationality, kin and work, which informed her agency and determination in a challenging situation in which she was both caring for a white socially-privileged family of five, while simultaneously grappling with the injustices of a state system of segregated indentured labour. Kirmayer and colleagues propose that “notions of resilience emerging from developmental psychology and psychiatry in recent years address the distinctive cultures, geographic and social settings, and histories of adversity of indigenous peoples”. Resilience is understood here as an ability to actively engage with traumatic change, involving the capacity to absorb stress and to transform in order to cope with it (Luthar et al.). Further to this, in an Indigenous context, Marion Kickett has found the capacity for resilience to be supported by three key factors: family connections, culture and belonging as well as notions of identity and history. In exploring the layers of this autobiographical story, I employ this extended psychological notion of resilience in both a domestic ambit as well as the broader social context for Indigenous people surviving a system of external domination. Additionally I consider the resilience Aunty Hilda demonstrates at a pivotal interlude between girlhood and womanhood within the trajectory of her overall long and productive life, and within an intergenerational history of resistance and accommodation. What is especially important about her storytelling is its refusal to be contained by the imaginary of the settler nation and its generic Aboriginal-female subject. She refuses victimhood while at the same time illuminating the mechanisms of injustice, hinting also at possibilities for alternative and more equitable relationships of family and work across cultural divides. Considered through this prism, resilience is, I suggest, also a quality firmly connected to ideas of Aboriginal cultural-sovereignty and standpoint and to, what Victoria Grieves has identified as, the Aboriginal knowledge value of sharing (25, 28, 45). Storytelling as Pedagogy The story I discuss was verbally recounted in a manner that Westphalen describes as “a continuation of Dreaming Stories”, functioning to educate and connect people and country (13-14). As MacGill et al. note, “the critical and transformative aspects of decolonising pedagogies emerge from storytelling and involve the gift of narrative and the enactment of reciprocity that occurs between the listener and the storyteller.” Hilda told me that as a child she was taught not to ask questions when listening to the stories of an Elder, and her own children were raised in this manner. Hilda's oldest daughter described this as a process involving patience, intrigue and surprise (Elva Wanganeen). Narratives unfold through nuance and repetition in a complexity of layers that can generate multiple levels of meaning over time. Circularity and recursivity underlie this pedagogy through which mnemonic devices are built so that stories become re-membered and inscribed on the body of the listener. When a perceived level of knowledge-transference has occurred, a narrator may elect to elaborate further, adding another detail that will often transform the story’s social, cultural, moral or political context. Such carefully chosen additional detail, however, might re-contextualise all that has gone before. As well as being embodied, stories are also emplaced, and thus most appropriately told in the Country where events occurred. (Here I use the Aboriginal English term “Country” which encompasses home, clan estate, and the powerful complex of spiritual, animate and inanimate forces that bind people and place.) Hilda Wilson’s following account of her first job as a housekeeper for “one of Adelaide’s leading doctors”, Dr Frank Swann, provides an illustration of how she expertly uses traditional narrative forms of incrementally structured knowledge transmission within a cross-cultural setting to tell a story that expresses practices of resilience as resistance and transformation at its core. A “White Doctor” Story: The First Layer Aunty Hilda first told me this story when we were winding along the South Eastern Freeway through the Adelaide hills between Murray Bridge and Mount Barker, in 1997, on our way home to Adelaide from a trip to Camp Coorong, the Ngarrindjeri cultural education centre co-founded by her granddaughter. She was then 86 years old. Ahead of us, the profile of Mt Lofty rose out of the plains and into view. The highest peak in the Mount Lofty ranges, Yurrebilla, as it is known to Kaurna Aboriginal people, or Mt Lofty, has been an affluent enclave of white settlement for Adelaide’s moneyed elite since early colonial times. Being in place, or in view of place, provided the appropriate opportunity for her to tell me the story. It belongs to a group of stories that during our initial period of working together changed little over time until one day two years later she an added contextual detail which turned it inside out. Hilda described the doctor’s spacious hill-top residence, and her responsibilities of caring for Dr Swann’s invalid wife (“an hysteric who couldn't do anything for herself”), their twin teenage boys (who attended private college in the city) along with another son and younger daughter living at home (pers. com. Hilda Wilson). Recalling the exhilaration of looking down over the sparkling lights of Adelaide at night from this position of apparent “privilege” on the summit, she related this undeniably as a success story, justifiably taking great pride in her achievements as a teenager, capable of stepping into the place of the non-Indigenous doctor's wife in running the large and demanding household. Successfully undertaking a wide range of duties employed in the care of a family, including the disabled mother, she is an active participant crucial to the lives of all in the household, including to the work of the doctor and the twin boys in private education. Hilda recalled that Mrs Swann was unable to eat without her assistance. As the oldest daughter of a large family Hilda had previously assisted in caring for her younger siblings. Told in this way, her account collapses social distinctions, delineating a shared social and physical space, drawing its analytic frame from an Indigenous ethos of subjectivity, relationality, reciprocity and care. Moreover Hilda’s narrative of domestic service demonstrates an assertion of agency that resists colonial and patriarchal hegemony and inverts the master/mistress-servant relationship, one she firmly eschews in favour of the self-affirming role of the lady of the house. (It stands in contrast to the abuse found in other accounts for example Read, Tucker, Kartinyeri. Often the key difference was a continuity of family connections and ongoing family support.) Indeed the home transformed into a largely feminised and cross-culturalised space in which she had considerable agency and responsibility when the doctor was absent. Hilda told me this story several times in much the same way during our frequent encounters over the next two years. Each telling revealed further details that fleshed a perspective gained from what Patricia Hill Collins terms an “epistemic privilege” via her “outsider-within status” of working within a white household, lending an understanding of its social mechanisms (12-15). She also stressed the extent of her duty of care in upholding the family’s well-being, despite the work at times being too burdensome. The Second Version: Coming to Terms with Intersecting Oppressions Later, as our relationship developed and deepened, when I began to record her life-narrative as part of my doctoral work, she added an unexpected detail that altered its context completely: It was all right except I slept outside in a tin shed and it was very cold at night. Mount Lofty, by far the coldest part of Adelaide, frequently experiences winter maximum temperatures of two or three degrees and often light snowfalls. This skilful reframing draws on Indigenous storytelling pedagogy and is expressly used to invite reflexivity, opening questions that move the listener from the personal to the public realm in which domestic service and the hegemony of the home are pivotal in coming to terms with the overlapping historical oppressions of class, gender, race and nation. Suddenly we witness her subjectivity starkly shift from one self-defined and allied with an equal power relationship – or even of dependency reversal cast as “de-facto doctor's wife” – to one diminished by inequity and power imbalance in the outsider-defined role of “mistreated servant”. The latter was signalled by the dramatic addition of a single signifying detail as a decoding device to a deeper layer of meaning. In this parallel stratum of the story, Hilda purposefully brings into relief the politics in which “the private domain of women's housework intersected with the public domain of governmental social engineering policies” (Haskins 4). As Aileen Moreton-Robinson points out, what for White Australia was cheap labour and a civilising mission, for Indigenous women constituted stolen children and slavery. Protection and then assimilation were government policies under which Indigenous women grew up. (96) Hilda was sent away from her family to work in 1927 by the universally-feared Sister Pearl McKenzie, a nurse who too-zealously (Katinyeri, Ngarrindjeri Calling, 23) oversaw the Chief Protector’s policies of “training” Aboriginal children from the South Australian missions in white homes once they reached fourteen (Haebich, 316—20). Indeed many prominent Adelaide hills’ families benefited from Aboriginal labour under this arrangement. Hilda explained her struggle with the immense cultural dislocation that removal into domestic service entailed, a removal her grandfather William Rankine had travelled from Raukkan to Government House to protest against less than a decade earlier (The Register December 21, 1923). This additional layer of story also illuminates Hilda’s capacity for resilience and persistence in finding a way forward through the challenge of her circumstances (Luthar et al.), drawing on her family networks and sense of personhood (Kickett). Hilda related that her father visited her at Mount Lofty twice, though briefly, on his way to shearing jobs in the south-east of the state. “He said it was no good me living like this,” she stated. Through his active intervention, reinforcement was requested and another teenager from Point Pearce, Hilda’s future husband’s cousin, Annie Sansbury, soon arrived to share the workload. But, Hilda explained, the onerous expectations coupled with the cultural segregation of retiring to the tin shed quickly became too much for Annie, who stayed only three months, leaving Hilda coping again alone, until her father applied additional pressure for a more suitable placement to be found for his daughter. In her next position, working for the family of a racehorse trainer, Hilda contentedly shared the bedroom with the small boy for whom she cared, and not long after returned to Point Pearce where she married Robert Wilson and began a family of her own. Gendered Resilience across Cultural Divides Hilda explicitly speaks into these spaces to educate me, because all but a few white women involved have remained silent about their complicity with state sanctioned practices which exploited Indigenous labour and removed children from their families through the policies of protection and assimilation. For Indigenous women, speaking out was often fraught with the danger of a deeper removal from family and Country, even of disappearance. Victoria Haskins writes extensively of two cases in New South Wales where young Aboriginal women whose protests concerning their brutal treatment at the hands of white employers, resulted in their wrongful and prolonged committal to mental health and other institutions (147-52, 228-39). In the indentured service of Indigenous women it is possible to see oppression operating through Eurocentric ideologies of race, class and gender, in which Indigenous women were assumed to take on, through displacement, the more oppressed role of white women in pre-second world war non-Aboriginal Australian society. The troubling silent shadow-figure of the “doctor’s wife” indeed provides a haunting symbol of - and also a forceful rebellion against – the docile upper middle-class white femininity of the inter-war era. Susan Bordo has argued that that “the hysteric” is archetypal of a discourse of ‘pathology as embodied protest’ in which the body may […] be viewed as a surface on which conventional constructions of femininity are exposed starkly to view in extreme or hyperliteral form. (20) Mrs Swann’s vulnerability contrasts markedly with the strength Hilda expresses in coping with a large family, emanating from a history of equitable gender relations characteristic of Ngarrindjeri society (Bell). The intersection of race and gender, as Marcia Langton contends “continues to require deconstruction to allow us to decolonise our consciousness” (54). From Hilda’s brief description one grasps a relationship resonant with that between the protagonists in Tracy Moffat's Night Cries, (a response to the overt maternalism in the film Jedda) in which the white mother finds herself utterly reliant on her “adopted” Aboriginal daughter at the end of her life (46-7). Resilience and Survival The different versions of story Hilda deploys, provide a pedagogical basis to understanding the broader socio-political framework of her overall life narrative in which an ability to draw on the cultural continuity of the past to transform the future forms an underlying dynamic. This demonstrated capacity to meet the challenging conditions thrown up by the settler-colonial state has its foundations in the connectivity and cultural strength sustained generationally in her family. Resilience moves from being individually to socially determined, as in Kickett’s model. During the onslaught of dispossession, following South Australia’s 1836 colonial invasion, Ngarrindjeri were left near-starving and decimated from introduced diseases. Pullume (c1808-1888), the rupuli (elected leader of the Ngarrindjeri Tendi, or parliament), Hilda’s third generation great-grandfather, decisively steered his people through the traumatic changes, eventually negotiating a middle-path after the Point McLeay Mission was established on Ngarrindjeri country in 1859 (Jenkin, 59). Pullume’s granddaughter, the accomplished, independent-thinking Ellen Sumner (1842—1925), played an influential educative role during Hilda’s youth. Like other Ngarrindjeri women in her lineage, Ellen Sumner was skilled in putari practice (female doctor) and midwifery culture that extended to a duty of care concerning women and children (teaching her “what to do and what not to do”), which I suggest is something Hilda herself drew from when working with the Swann family. Hilda’s mother and aunties continued aspects of the putari tradition, attending births and giving instruction to women in the community (Bell, 171, Hughes Grandmother, 52-4). As mentioned earlier, when the South Australian government moved to introduce The Training of Children Act (SA) Hilda’s maternal grandfather William Rankine campaigned vigorously against this, taking a petition to the SA Governor in December 1923 (Haebich, 315-19). As with Aunty Hilda, William Rankine used storytelling as a method to draw public attention to the inequities of his times in an interview with The Register which drew on his life-narrative (Hughes, My Grandmother, 61). Hilda’s father Wilfred Varcoe, a Barngarrla-Wirrungu man, almost a thousand kilometres away from his Poonindie birthplace, resisted assimilation by actively pursuing traditional knowledge networks using his mobility as a highly sought after shearer to link up with related Elders in the shearing camps, (and as we saw to inspect the conditions his daughter was working under at Mt Lofty). The period Hilda spent as a servant to white families to be trained in white ways was in fact only a brief interlude in a long life in which family connections, culture and belonging (Kickett) served as the backbone of her resilience and resistance. On returning to the Point Pearce Mission, Hilda successfully raised a large family and activated a range of community initiatives that fostered well-being. In the 1960s she moved to Adelaide, initially as the sole provider of her family (her husband later followed), to give her younger children better educational opportunities. Working with Aunty Gladys Elphick OBE through the Council of Aboriginal Women, she played a foundational role in assisting other Aboriginal women establish their families in the city (Mattingly et al., 154, Fisher). In Adelaide, Aunty Hilda became an influential, much loved Elder, living in good health to the age of ninety-six years. The ability to survive changing circumstances, to extend care over and over to her children and Elders along with qualities of leadership, determination, agency and resilience have passed down through her family, several of whom have become successful in public life. These include her great-grandson and former AFL football player, Michael O’Loughlin, her great-nephew Adam Goodes and her-grand-daughter, the cultural weaver Aunty Ellen Trevorrow. Arguably, resilience contributes to physical as well as cultural longevity, through caring for the self and others. Conclusion This story demonstrates how sociocultural dimensions of resilience are contextualised in practices of everyday lives. We see this in the way that Aunty Hilda Wilson’s self-narrated story resolutely defies attempts to know, subjugate and categorise, operating instead in accord with distinctively Aboriginal expressions of gender and kinship relations that constitute an Aboriginal sovereignty. Her storytelling activates a revision of collective history in ways that valorise Indigenous identity (Kirmayer et al.). Her narrative of agency and personal achievement, one that has sustained her through life, interacts with the larger narrative of state-endorsed exploitation, diffusing its power and exposing it to wider moral scrutiny. Resilience in this context is inextricably entwined with practices of cultural survival and resistance developed in response to the introduction of government policies and the encroachment of settlers and their world. We see resilience too operating across Hilda Wilson’s family history, and throughout her long life. The agency and strategies displayed suggest alternative realities and imagine other, usually more equitable, possible worlds. References Bell, Diane. Ngarrindjeri Wurruwarrin: A World That Is, Was and Will Be. Melbourne: Spinifex, 1998. 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Becker. “The Construct of Resilience: A Critical Evaluation and Guidelines for Future Work.” Child Development 71.3 (2000): 543-62. MacGill, Bindi, Julie Mathews, Ellen Trevorrow, Alice Abdulla, and Deb Rankine. “Ecology, Ontology, and Pedagogy at Camp Coorong,” M/C Journal 15.3 (2012). Mattingly, Christobel, and Ken Hampton. Survival in Our Own Land, Adelaide: Wakefield, 1988. Moreton-Robinson, Aileen. Talkin’ Up to the White Woman. St Lucia: UQP, 2000. Night Cries, A Rural Tragedy. Dir. Tracy Moffatt. Chili Films, 1990. Read, Peter. A Rape of the Soul So Profound. Crows Nest: Allen & Unwin, 2002. Tucker, Margaret. If Everyone Cared. Sydney: Ure Smith, 1977. Wanganeen, Elva. Personal Communication, 2000. Westphalen, Linda. An Anthropological and Literary Study of Two Aboriginal Women's Life Histories: The Impacts of Enforced Child Removal and Policies of Assimilation. New York: Mellen Press, 2011.