Academic literature on the topic 'Soil chemistry – Queensland'
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Journal articles on the topic "Soil chemistry – Queensland"
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Perrett, Christine, Olusegun O. Osunkoya, and Cameron Clark. "Cat's claw creeper vine, Macfadyena unguis-cati (Bignoniaceae), invasion impacts: comparative leaf nutrient content and effects on soil physicochemical properties." Australian Journal of Botany 60, no. 6 (2012): 539. http://dx.doi.org/10.1071/bt12055.
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Macfadyena unguis-cati (L.) Gentry (Bignoniaceae) is a major environmental weed in coastal Queensland, Australia. There is a lack of quantitative data on its leaf chemistry and its impact on soil properties. Soils from infested vs uninfested areas, and leaves of M. unguis-cati and three co-occurring vine species (one exotic, two native) were collected at six sites (riparian and non-riparian) in south-eastern Queensland. Effects of invasion status, species, site and habitat type were examined using univariate and multivariate analyses. Habitat type had a greater effect on soil nutrients than on leaf chemistry. Invasion effect of M. unguis-cati on soil chemistry was more pronounced in non-riparian than in riparian habitat. Significantly higher values were obtained in M. unguis-cati infested (vs. uninfested) soils for ~50% of traits. Leaf ion concentrations differed significantly between exotic and native vines. Observed higher leaf-nutrient load (especially nitrogen, phosphorus and potassium) in exotic plants aligns with the preference of invasive plant species for disturbed habitats with higher nutrient input. Higher load of trace elements (aluminium, boron, cadmium and iron) in its leaves suggests that cycling of heavy-metal ions, many of which are potentially toxic at excess level, could be accelerated in soils of M. unguis-cati-invaded landscape. Although inferences from the present study are based on correlative data, the consistency of the patterns across many sites suggests that M. unguis-cati may improve soil fertility and influence nutrient cycling, perhaps through legacy effects of its own litter input.
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Aitken, RL, AJ Jeffrey, and BL Compton. "Evaluation of selected extractants for boron in some Queensland soils." Soil Research 25, no. 3 (1987): 263. http://dx.doi.org/10.1071/sr9870263.
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Glasshouse and laboratory studies were undertaken to evaluate a range of extractants for determining the boron status of a suite of predominantly acidic soils. In addition to hot water (commonly used as an extractant for soil boron), hot 0.01 M CaCl2,, 0.05 M mannitol/0.01 M CaCl2, 0.05 M mannitol (buffered at pH 7.9, 1 M NH4OAc, 5% (v/v) glycerol and 0.01 M tartaric acid were assessed as extractants since these reagents can complex boron. Sunflower (Helianthus annuus cv. Hysun 31) was grown with three levels of applied boron (0, 0.5 and 1.0 kg B ha-1) in each of 20 soils. Relative dry matter yield, tissue boron concentration, boron uptake and relative boron uptake of control plants (0 kg B ha- l) were determined. Both hot water and hot 0.01 M CaCl2 extractable boron were related to each of these plant parameters, whereas boron extracted by the other procedures was not. Levels of boron extracted with mannitol and glycerol were very low in comparison to those displaced from the soil by the refluxing procedures. The inability of mannitol to extract boron from these soils is discussed in relation to the chemistry of mannitol-boron complexes, and it is suggested that mannitol would not be an effective extractant for boron in acid soils. Soil solution extracts (obtained after equilibration at 10 kPa matric suction) had concentrations < 0.1 �g B ml-l. Because of the low concentrations and narrow range across the 20 soils, soil solution boron was not related to plant growth parameters obtained from the glasshouse study.
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Biggs, A. J. W., K. Bryant, and K. M. Watling. "Soil chemistry and morphology transects to assist wetland delineation in four semi-arid saline lakes, south-western Queensland." Soil Research 48, no. 3 (2010): 208. http://dx.doi.org/10.1071/sr09127.
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Soils at 4 saline lakes (Wyara, Numalla, Wombah and Bindegolly) in semi-arid south-western Queensland were described and sampled to determine soil attributes that assist in the delineation of wetlands. Up to 4 sites were described in transects perpendicular to the lake edge. Samples from fixed depths were analysed for limited ionic chemistry and, in some cases, selected acid sulfate soil parameters. Lakebed soils were alkaline Hypersalic Hydrosols, changing to a variety of soils, including alkaline Rudosols and Podosols on adjacent lunettes and beach ridges. Gley colours and mottling were indicative of lakebed soils, while redder colours and stratification were common in soils outside the wetland. Evaporative concentration of salts at the soil surface was common in lakebed and transition zone soils, whereas leaching of salts was common in sandier soils outside the wetlands. Analysis of acid sulfate soil parameters and field evidence in the beds of Lakes Wyara and Wombah confirmed the presence of unoxidised sulfidic sediments and extensive neutralising capacity. Wave action formation of beach ridges appeared to be the most prevalent land-forming process at 3 lakes, but wind-driven deflation with associated lunette-building was evident at Lake Bindegolly. The data confirmed the value of pedological features such as texture, colour, and salinity trends in determining the boundaries of these wetlands, but also highlighted the transient nature of these features.
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Bramley, RGV, N. Ellis, RO Nable, and AL Garside. "Changes in soil chemical properties under long-term sugar cane monoculture and their possible role in sugar yield decline." Soil Research 34, no. 6 (1996): 967. http://dx.doi.org/10.1071/sr9960967.
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Soil samples from paired 'old' and 'new' sugar cane soils from 6 contrasting sites in 3 climatically contrasting areas of North Queensland were analysed to identify changes in soil chemistry resulting from continuous sugar cane monoculture. The aim was to identify soil factors that may be associated with, or act as triggers to, the expression of sugar yield decline. It was found that there was no consistent effect of time under sugar monoculture on soil chemical properties across all sites, when either the distributions of properties through the soil profile, or property values at specific depths, were considered. However, marked effects were noted at some sites with respect to some soil properties, and the lack of consistent results across all sites may therefore be attributable to the inherent differences between the soils sampled. These effects were generally consistent with soil acidification.
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Hendry, Rebecca A., and Kevin Ray Wormington. "Eucalypt forests as indicators of the gradients within the central Queensland serpentine landscape of Australia." Australian Journal of Botany 61, no. 7 (2013): 544. http://dx.doi.org/10.1071/bt12024.
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The eucalypt forests of the central Queensland serpentine landscape on the eastern coast of Australia are dominated by two overstorey species. These are Eucalyptus fibrosa F.Muell. subsp. fibrosa, the most dominant tree occurring throughout the landscape, and Corymbia xanthope A.R.Bean & Brooker, a serpentine endemic species which has a more restricted distribution. We hypothesised that the structure and foliage elements of the eucalypt forests could be used as biological indicators of the severity of the serpentine soils. This was tested by surveying 30 plots (50 × 20 m) within the upland landform patterns of the central Queensland serpentine landscape. The structure of the forests and abundance of the species were recorded and foliage samples from the dominant tree E. fibrosa subp. fibrosa were collected and analysed for metal and nutrient content. Soil samples from each site were collected and analysed for major cations, bio-available metals and fertility. Analysis of the data showed that there are significant correlations between the structure of the eucalypt forests and the landform patterns and soil chemistry. The relative basal area of C. xanthope is a useful measure of the severity of the serpentine soils and correlates to the soil Mg : Ca quotients. The tree E. fibrosa subsp. fibrosa was found to regulate its uptake of soil elements and cannot be used as an indicator of soil elements.
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Congdon, Robert A., and John L. Herbohn. "Ecosystem dynamics of disturbed and undisturbed sites in north Queensland wet tropical rain forest. I. Floristic composition, climate and soil chemistry." Journal of Tropical Ecology 9, no. 3 (August 1993): 349–63. http://dx.doi.org/10.1017/s0266467400007409.
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ABSTRACTThis paper introduces studies of nutrient cycling in disturbed and undisturbed rain forest plots in the upper catchment of Birthday Creek, near Paluma, North Queensland. The catchment is underlain by granite and has soils of comparatively low fertility. Differences between unlogged plots and plots disturbed 25 years previously by selective logging are still apparent. Disturbed plots have soils with higher bulk densities and pH, lower CEC, kjeldahl nitrogen and available phosphorus concentrations, and changed species composition. The data suggest that recovery from selective logging is dependent on soil fertility and intensity of disturbance.
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You, Fang, Ram C. Dalal, and Longbin Huang. "Biochemical properties of highly mineralised and infertile soil modified by acacia and spinifex plants in northwest Queensland, Australia." Soil Research 54, no. 3 (2016): 265. http://dx.doi.org/10.1071/sr15069.
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Root zone soil properties can significantly influence the establishment of revegetated plant communities and alter their development trajectories in mined landscapes, due to closely coupled biogeochemical linkages between soil and plant systems. The present study aimed to characterise physicochemical and biochemical conditions in soil colonised by slow-growing native plant species: Acacia chisholmii (C3, native leguminous shrub) and Triodia pungens (spinifex C4 grass) in Mt Isa, North-west Queensland, Australia. This is to provide the basis for engineering growth media and root zones suitable for supporting target native plant communities to be revegetated in mined landscapes under subtropical and semiarid climatic conditions. Litter chemistry, soil physicochemical properties, and microbial community structure based on phospholipid fatty acids (PLFAs) biomarker method and activities (basal respiration, net mineralisation, dehydrogenase, invertase, urease and neutral phosphatase activities) were characterised in the surface soils beneath the keystone native plant species. Results showed that soils sampled were generally infertile with low levels of total organic carbon (TOC), available nutrients and slow cycling processes with bacteria dominant microbial communities supporting the native plant species. Surface soils underneath acacia and spinifex were modified by in situ litter return, in terms of TOC, and structure and functions of microbial communities. The levels of soil microbial biomass C and N, basal respiration rate and net mineralisation rate in the acacia soil were twice as much as those in the spinifex. Microbial communities in the acacia soil had a greater fungal:bacterial ratio than in the spinifex. On this basis, growth media and root zones for revegetating native acacia-spinifex communities at local mined landscapes may be engineered by using plant organic matter remediation to supply available nutrients and to rehabilitate suitable microbial communities for in situ litter decomposition and nutrient cycling.
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Biggs, Andrew J. W., and Peter Binns. "Soil morphological and chemical profiles adjacent to a bore drain in south-western Queensland, Australia." Soil Research 53, no. 3 (2015): 325. http://dx.doi.org/10.1071/sr14195.
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A recently abandoned artesian bore drain in south-western Queensland was sampled to investigate soil morphology and chemistry under, and adjacent to, the drain. Such drains are supplied with alkaline, sodium-rich artesian groundwater and they provide a long-term example of the impacts of these waters on soils. A Red Kandosol and a Grey Vertosol were sampled, in the drain and at 2, 4 and 25 m perpendicular to the drain. Morphological attributes indicative of long-term saturation, such as mottling, were evident around the drains, but were absent at the control sites (25 m away). At the Kandosol location, pH and exchangeable sodium were elevated within 4 m of the drain, and salinity data suggested a horizontally displaced wetting front at ~4 m from the drain. In the Grey Vertosol, which was naturally saline and sodic below 0.5 m, substantial leaching of salts had occurred around the drain, but a horizontal wetting front was also evident and exchangeable sodium was increased within 4 m of the drain. A thin, weak pan was detected in the subsoil of the Red Kandosol under the drain bank, but pans were otherwise absent under the drains. The results indicate that deep drainage is a feature not only of the Red Kandosol, but also the Grey Vertosol, despite it being sodic and despite the application of sodic, alkaline water. The findings reiterate the importance of investigating soil and water chemistry interactions when designing channels, storages and irrigation systems, in particular those using sodic–saline waters.
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Gillman, G. P., D. C. Burkett, and R. J. Coventry. "A laboratory study of application of basalt dust to highly weathered soils: effect on soil cation chemistry." Soil Research 39, no. 4 (2001): 799. http://dx.doi.org/10.1071/sr00073.
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Surface (0–10 cm) samples from 7 highly weathered soils in tropical coastal Queensland were incubated for 3 months at room temperature and at field moisture capacity with basalt dust applied in 2 size fractions: <150 µm and 40 µm. The basalt application was mixed at 0, 1, 5, 25, and 50 t/ha to cover situations of moderate applications as well as where the amendment might be banded to achieve high local concentrations. Basalt dust application caused desirable increases in soil pH, reduced the content of exchangeable acidic cations, increased soil cation exchange capacity, and increased the content of base cations in all soils. By determining fundamental surface charge characteristics of these variable charge soils, it was possible to show that the additional base cations released from the basalt dust were present as exchangeable cations, and that the amounts released were controlled by the number of negatively charged sites available, i.e. soil cation exchange capacity. Selected treatments were then subjected to a strong leaching environment to assess the longevity of the effects obtained. Soil properties remained virtually unchanged by the leaching treatment, except that significant amounts of monovalent K and Na were removed. At the higher rates of application, the amounts of base cations released from the basalt were small in comparison with the actual amounts applied, indicating that the amendment could be effective over a considerable period of time.
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Thompson, CH. "Genesis of podzols on coastal dunes in southern Queensland .I. Field relationships and profile morphology." Soil Research 30, no. 5 (1992): 593. http://dx.doi.org/10.1071/sr9920593.
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This paper is the first of a series reporting studies in the genesis of podzols and humus podzols on coastal dunes in a chronosequence that spans >700K yrs. It is concerned mainly with temporal changes in profile morphology across a podzol chronosequence and with brief descriptions of sites chosen for genetic studies. It summarizes the geology, geomorphology and general mineralogy of dune systems at Cooloola and North Stradbroke Island and briefly discusses the effects of parent material, geomorphic component, climate, dune denudation and vegetation on soil development. Its purpose is to provide a field and morphological framework for other papers in the series dealing essentially with laboratory investigations and interpretations of the chemistry, mineralogy and genesis of these subtropical soils.
Dissertations / Theses on the topic "Soil chemistry – Queensland"
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Clark, Benjamin Robert. "Studies on the chemistry of Australian microbes /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe.pdf.
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