Literatura académica sobre el tema "Soils Australia Nitrogen content"

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Artículos de revistas sobre el tema "Soils Australia Nitrogen content"

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Paul, K. I., P. J. Polglase, A. M. O'Connell, J. C. Carlyle, P. J. Smethurst, and P. K. Khanna. "Soil nitrogen availability predictor (SNAP): a simple model for predicting mineralisation of nitrogen in forest soils." Soil Research 40, no. 6 (2002): 1011. http://dx.doi.org/10.1071/sr01114.

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A new empirical model (SNAP) combines a simple laboratory measurement of the basal rate of N mineralisation with the modifying effects of daily temperature and water content to predict seasonal and annual rates of mineralisation of forest soils. Short-term (20-60-day) aerobic incubations of either undisturbed or bulked and mixed soil were found suitable for prediction of the basal rate of N mineralisation. Data from laboratory incubations of a range of soils were used to calibrate empirical relationships describing the effects of temperature (Tm) and water (Wm) on rates of N mineralisation. Su
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Ewing, MA, AD Bathgate, RJ French, and CK Revell. "The role of crop and pasture legumes in rotations on duplex soils." Australian Journal of Experimental Agriculture 32, no. 7 (1992): 971. http://dx.doi.org/10.1071/ea9920971.

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Duplex soils are prominent in southern Australia and are generally low in fertility. Their agricultural performance is, therefore, suboptimal in most circumstances without an exogenous source of nitrogen. This is often supplied by legumes which are grown in rotation with non-leguminous crops. Both crop and pasture legumes are now widely used in southern Australia and the contribution that they make to the non-legume phase of rotations is through nitrogen fixation and through other mechanisms such as cereal disease breaks. We use a mathematical programming model, MIDAS (Model of an Integrated F
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O'Sullivan, Cathryn A., Steven A. Wakelin, Ian R. P. Fillery, and Margaret M. Roper. "Factors affecting ammonia-oxidising microorganisms and potential nitrification rates in southern Australian agricultural soils." Soil Research 51, no. 3 (2013): 240. http://dx.doi.org/10.1071/sr13039.

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Ammonia-oxidising archaea (AOA) have recently been described as having an important role in soil nitrification. However, published data on factors which influence their distribution and their impact on a soil’s potential nitrification rates (PNR) are sparse, particularly compared with the amount of information available regarding ammonia-oxidising bacteria (AOB). This study had two aims. First, to investigate which environmental factors affect the AOA : AOB ratio in soils from two agricultural regions, and second, to explore whether the abundance of either AOA or AOB correlated with PNR. Sampl
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Spain, AV. "Influence of environmental conditions and some soil chemical properties on the carbon and nitrogen contents of some tropical Australian rainforest soils." Soil Research 28, no. 6 (1990): 825. http://dx.doi.org/10.1071/sr9900825.

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Concentrations of carbon, total nitrogen, total phosphorus, soil pH, the sum of the exchangeable basic cations, clay and dithionite-extractable iron were examined in the surface soils of 72 rainforest sites from north-eastern tropical Queensland. Soils derived from basalt had higher levels of most of the above properties than those formed on other parent materials. Differences between the carbon status of soils formed from basalt and those formed from other parent materials may be related to the higher free iron levels and phosphorus status of the former group. Excluding the soils of basalt or
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Baldock, J. A., B. Hawke, J. Sanderman, and L. M. Macdonald. "Predicting contents of carbon and its component fractions in Australian soils from diffuse reflectance mid-infrared spectra." Soil Research 51, no. 8 (2013): 577. http://dx.doi.org/10.1071/sr13077.

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Quantifying the content and composition of soil carbon in the laboratory is time-consuming, requires specialised equipment and is therefore expensive. Rapid, simple and low-cost accurate methods of analysis are required to support current interests in carbon accounting. This study was completed to develop national and state-based models capable of predicting soil carbon content and composition by coupling diffuse reflectance mid-infrared (MIR) spectra with partial least-squares regression (PLSR) analyses. Total, organic and inorganic carbon contents were determined and MIR spectra acquired for
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Wong, M. T. F., and K. Wittwer. "Positive charge discovered across Western Australian wheatbelt soils challenges key soil and nitrogen management assumptions." Soil Research 47, no. 1 (2009): 127. http://dx.doi.org/10.1071/sr08098.

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Nitrogen management in Western Australia (WA) and in cropping areas elsewhere in Australia assumes that soil contains negligible or no positive charge and is therefore unable to retain nitrate against leaching. The amount of water needed to displace nitrate is thus assumed to be the drainable volume of water held by the soil (1 pore volume), and in sandy soils about 100 mm drainage is assumed to be required to displace nitrate by 1 m. The clay mineralogy of the highly weathered soils of the WA wheatbelt is dominated by kaolinite and iron and aluminium oxides. This mineralogy suggests likely oc
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Moata, Melinda R. S., Ashlea L. Doolette, Ronald J. Smernik, Ann M. McNeill, and Lynne M. Macdonald. "Organic phosphorus speciation in Australian Red Chromosols: stoichiometric control." Soil Research 54, no. 1 (2016): 11. http://dx.doi.org/10.1071/sr15085.

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Organic phosphorus (P) plays an important role in the soil P cycle. It is present in various chemical forms, the relative amounts of which vary among soils, due to factors including climate, land use, and soil type. Few studies have investigated co-variation between P types or stoichiometric correlation with the key elemental components of organic matter– carbon (C) and nitrogen (N), both of which may influence P pool structure and dynamics in agricultural soils. In this study we determined the organic P speciation of twenty Australian Red Chromosols soils, a soil type widely used for cropping
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Latta, R. A., and A. Lyons. "The performance of lucerne - wheat rotations on Western Australian duplex soils." Australian Journal of Agricultural Research 57, no. 3 (2006): 335. http://dx.doi.org/10.1071/ar04016.

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In field experiments on duplex soils in the south-eastern and central Western Australian wheatbelt, lucerne (Medicago sativa L.) was compared with subterranean clover (Trifolium subterraneum L.) in pasture–crop rotations. Comparative pasture plant densities and biomass, soil water content, available soil nitrogen, wheat grain yield, and protein content were measured during 2 and 3 years of pasture followed by 2 and 1 year of wheat, respectively. Lucerne densities declined by 60–90% over the 3-year pasture phase but produced up to 3 times more total annual biomass than weed-dominant annual past
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Lewis, DC, and LA Sparrow. "Implications of soil type, pasture composition and mineral content of pasture components for the incidence of grass tetany in the South East of South Australia." Australian Journal of Experimental Agriculture 31, no. 5 (1991): 609. http://dx.doi.org/10.1071/ea9910609.

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The occurrence of grass tetany related deaths in cattle grazing pasture in the South East of South Australia is related to soil type. The greatest losses occur on the solodised solonetz soils, with few, if any, on the rendzina or siliceous sand soils in the region. Pastures from 3 soil types were sampled on 2 occasions during the growing period, and soils were sampled once. Comparisons were made for the pasture components of potassium (K), calcium (Ca) and magnesium (Mg) concentrations in soils, and K, Ca, Mg, nitrogen (N) and sulfur (S) concentrations in plants. In the July sampling, the mean
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Bauhus, J., PK Khanna, and RJ Raison. "The effect of fire on carbon and nitrogen mineralization and nitrification in an Australian forest soil." Soil Research 31, no. 5 (1993): 621. http://dx.doi.org/10.1071/sr9930621.

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The causes of onset of nitrification in a soil collected under an ashbed which was produced when heaped slash was burned, and for its absence in an unburnt soil, were investigated for an acid forest soil from south-eastern Australia. The occurrence of nitrification in ashbed soils was assessed in laboratory incubations extendig to 151 days to determine if it could be attributed to (a) an increase in pH, (b) an additional supply of P, (c) the removal of chemical inhibitors, and (d) the lack of competition with heterotrophs killed during soil heating. The treatments were: percolated and unpercol
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Tesis sobre el tema "Soils Australia Nitrogen content"

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Lotfollahi, Mohammad. "The effect of subsoil mineral nitrogen on grain protein concentration of wheat." Title page, table of contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phl882.pdf.

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Copy of author's previously published work inserted. Bibliography: leaves 147-189. This project examines the uptake of mineral N from the subsoil after anthesis and its effect on grain protein concentration (GPC) of wheat. The overall objective is to examine the importance of subsoil mineral N and to investigate the ability of wheat to take up N from the subsoil late in the season under different conditions of N supply and soil water availability. Greenhouse experiments investigate the importance of subsoil mineral N availability on GPC of wheat and the factors that contribute to the effective
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Hoyle, Frances Carmen. "The effect of soluble organic carbon substrates, and environmental modulators on soil microbial function and diversity." University of Western Australia. School of Earth and Geographical Sciences, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0050.

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[Truncated abstract] The principal aim of this thesis was to examine the response of the microbial community to the addition of small amounts (<50 μg C g-1 soil) of organic C substrates (‘trigger molecules’) to soil. This addition is comparative to indigenous soluble C concentrations for a range of soil types in Western Australia (typically measured between 20 and 55 μg C g-1 soil). Previously it has been reported that the application of trigger molecules to European soils has caused more CO2-C to be evolved (up to six fold) than was applied . . . Findings from this study indicated that there
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Lalor, Briony Maree. "An assessment of the recovery of the microbial community in jarrah forest soils after bauxite mining and prescription burning." University of Western Australia. School of Earth and Geographical Sciences, 2009. http://theses.library.uwa.edu.au/adt-WU2010.0037.

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[Truncated abstract] Recovery of soil nutrients, microbial populations and carbon (C) and nitrogen (N) cycling processes are critical to the success of rehabilitation following major ecosystem disturbance. Bauxite mining represents a major ecosystem disturbance to the jarrah (Eucalyptus marginata) forest in the south-west of Western Australia. Mining has created a mosaic of mined areas in various stages of succession surrounded by non-mined forest areas. Initial site preparations within rehabilitation areas such as contour ripping alter soil structure (creation of mound and furrows) and over t
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Baethgen, Walter E. "Plant nitrogen availability in selected Virginia soils." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/90907.

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Surface and subsoil samples were collected from agriculturally important soils of Coastal Plain, Piedmont and Ridge and Valley regions of Virginia for the purpose of determining the contribution of different soil N fractions to plant available N. Soil samples were analyzed for exchangeable and non-exchangeable NH₄⁺-N, NO₃⁻-N, total N, and organic matter contents. The samples were also subjected to the anaerobic incubation procedure as an index of organic N availability. Plant available N was measured by N uptake of successive wheat crops grown in the greenhouse. Multiple linear regression mode
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Mehdi, Bano B. "Soil nitrate-N and plant nitrogen distributions under different tillage practices." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0005/MQ44220.pdf.

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Sarmah, Ajit K. "Persistence and mobility of triasulfuron, metsulfuronmethyl, and chlorsulfuron in alkaline soils." Title page, abstract and contents only, 1998. http://web4.library.adelaide.edu.au/theses/09PH/09phs2461.pdf.

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Bibliography: leaves 157-174. This study examined the fate of three common sulfonylurea herbicides in highly alkaline soils through a series of laboratory and field experiments to determine if existing leaching models could be used to describe their field behaviour under Australian climatic conditions. A liquid chromatographic method was developed to simultaneously determine levels of triasulfuron, metsulfuronmethyl, and chlorsulfuron in soil and water. The investigation of base hydrolysis for the herbicides in aqueous buffer and soil solutions determined that it was unlikely to be a major los
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Fotovat, Amir. "Chemistry of indigenous Zn and Cu in the soil-water system : alkaline sodic and acidic soils." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phf761.pdf.

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Copies of author's previously published articles inserted. Bibliography: leaves 195-230. In this study the soil aqueous phase chemistry of Zn and Cu in alkaline sodic soils are investigated. The chemistry of trace metal ions at indigenous concentrations in alkaline sodic soils are reported. Metal ions at low concentrations are measured by the graphite furnace atomic absorption spectrometry (GFAAS) technique.
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Haskin, Catherine Marie. "Nitrogen availability and soil microclimate after clearcutting lodgepole pine." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24677.

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Long term management of lodgepole pine depends, in part, on the nutrient capital of the site. Harvesting has been shown to increase the availability of nitrogen and other nutrients for a limited period of time. This increase, or nutrient flush, following cutting has been attributed to several factors including changes in organic matter quantity and quality, soil moisture and temperature regimes, and competition for nutrients. Knowledge of the duration and the magnitude of the nutrient flush would be valuable for management decisions. A consequence of lodgepole pine clearcuts was studied for s
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Simon, John J. "Wastewater application to soils: hydraulic and nitrogen considerations." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/71186.

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Land application of domestic and industrial wastewaters provides an effective means of recycling water and its components into the ecosystem. Successful treatment by soil requires that wastewater is applied in quantities that both maintain infiltrative capacity of the soil and do not exceed the capacity of the soil-plant system to assimilate biological and chemical contaminants. Application of N-rich wastewaters requires that consideration be given to both the ability of the soil to transmit the hydraulic load and remove sufficient N to maintain groundwater quality standards. A textile wastewa
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Melkamu, Teshome. "Intercropping in corn : soil physical quality and soil inorganic nitrogen levels." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ44098.pdf.

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Libros sobre el tema "Soils Australia Nitrogen content"

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Subasinghe, Ranjith. Increasing productivity and water use efficiency in Australia's rice industry through nitrogen management. Barton, A.C.T: RIRDC, 2009.

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Alexander, John D. Nitrogen-loss potential ratings for Illinois soils: By John D. Alexander. [Illinois: University of Illinois at Urbana-Champaign, College of Agriculture, Agricultural Experiment Station in cooperation with the Soil Conservation Service, U.S. Dept. of Agriculture], 1987.

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Alexander, John D. Nitrogen-loss potential ratings for Illinois soils: By John D. Alexander. [Illinois: University of Illinois at Urbana-Champaign, College of Agriculture, Agricultural Experiment Station in cooperation with the Soil Conservation Service, U.S. Dept. of Agriculture], 1987.

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D, Alexander John. Nitrogen-loss potential ratings for Illinois soils: By John D. Alexander. Illinois: University of Illinois at Urbana-Champaign, College of Agriculture, Agricultural Experiment Station in cooperation with the Soil Conservation Service, U.S. Dept. of Agriculture, 1987.

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J, Hatch D., ed. Controlling nitrogen flows and losses. Wageningen: Wageningen Academic Publishers, 2004.

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Taylor, C. M. A. Nitrogen deficiency in Sitka spruce plantations. London: HMSO, 1990.

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N, Mishustin E., ред. T͡Sikl azota v pochve i ėffektivnostʹ udobreniĭ. Moskva: "Nauka", 1989.

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Zhongguo tu rang xue hui. Tu rang nong ye hua xue zhuan ye wei yuan hui and Zhongguo tu rang xue hui. Tu rang sheng wu he sheng wu hua xue zhuan ye wei yuan hui, eds. Wo guo tu rang dan su yan jiu gong zuo di xian zhuang yu zhan wang: Zhongguo tu rang xue hui tu rang dan su gong zuo hui yi lun wen ji. Beijing: Ke xue chu ban she, 1986.

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Poletschny, H. Vergleichende Erprobung verschiedener Stickstoffbestimmungsmethoden in Böden. Münster-Hiltrup: Landwirtschaftsverlag, 1989.

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International Symposium on Nitrogen Economy in Tropical Soils (1994 Trinidad and Tobago). Nitrogen economy in tropical soils: Proceedings of the International Symposium on Nitrogen Economy in Tropical Soils, held in Trinidad, W.I., January 9-14, 1994. Dordrecht: Kluwer Academic Publishers, 1996.

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Capítulos de libros sobre el tema "Soils Australia Nitrogen content"

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Dalal, R. C., W. M. Strong, E. J. Weston, J. E. Cooper, K. J. Lehane, and A. J. King. "Comparison of legumes and fertilizer nitrogen for wheat production in subtropical Australia." In Nitrogen Economy in Tropical Soils, 363–69. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1706-4_35.

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Németh, T., A. Abd El-Galil, L. Radimszky, and Gy Baczó. "Effect of plant residues on ammonium and nitrate content of soils during incubation." In Progress in Nitrogen Cycling Studies, 109–14. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-5450-5_17.

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Russow, R., and M. Körschens. "Nitrous Oxide Formation in Black Earth Soils Depending on the Soil Water Content." In Progress in Nitrogen Cycling Studies, 607–11. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-5450-5_99.

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Slattery, J. F., W. J. Slattery, and B. M. Carmody. "Influence of Soil Chemical Characteristics on Medic Rhizobia in the Alkaline Soils of South Eastern Australia." In Highlights of Nitrogen Fixation Research, 243–49. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4795-2_49.

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Anderson, G. C., and I. R. P. Fillery. "Sulphate and nitrogen net mineralisation in coarse-textured soils in western Australia." In Plant Nutrition, 944–45. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/0-306-47624-x_460.

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Anton, A., L. Radimszky, T. Szili-Kovács, G. Füleky, and F. Gulyás. "Effects of environmental factors and Mn, Zn, Cu trace elements on the available N content of two soils." In Progress in Nitrogen Cycling Studies, 173–77. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-5450-5_27.

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Gordon, D. M. "Diurnal water relations and the salt content of two contrasting mangroves growing in hypersaline soils in tropical-arid Australia." In Towards the rational use of high salinity tolerant plants, 193–216. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1858-3_21.

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Dziamski, A., M. Banach-szott, M. Drag, and Z. Stypcyñska. "Content of Organic Carbon and Nitrogen as Well as Root Mass in Meadow Soils Under a Combined Slope and Flood Irrigation System." In Functions of Natural Organic Matter in Changing Environment, 319–22. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5634-2_58.

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Maun, M. Anwar. "The Ammophila problem." In The Biology of Coastal Sand Dunes. Oxford University Press, 2009. http://dx.doi.org/10.1093/oso/9780198570356.003.0012.

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Even a cursory look on foredune plant communities shows vigorous dense stands of dune species in areas with moderate recurrent sand accretion levels specific for each plant species (Disraeli 1984; Maun and Baye 1989; Maun 1998). The phenomenon has been well documented in species of Ammophila arenaria (Carey and Oliver 1918; Tansley 1953), Corynephorus canescens (Marshall 1965), A. breviligulata (Eldred and Maun 1982) and Calamovilfa longifolia (Maun 1985). Burial has a positive influence on growth and flowering of plants and debilitated populations of foredune plant species can be rejuvenated by sand deposition (Maun 1998). Clear evidence of this phenomenon was presented by Maze and Whalley (1992a), who examined population dynamics of Spinifex sericeus in five zones receiving different amounts of sand deposition on a coastal dune system of Australia: the sea side of the first dune ridge, crest of first dune ridge, swale, Acacia thickets and stable hind dunes. In the very dynamic area on the sea side or toe of the first dune ridge (high beach) with regular burial or erosion of up to 1 m or more the plants produced very vigorous stolons with long internodes. On the crest of the dune ridge with sand deposition of about 17.5 cm per year even though plants had fewer stolons, they responded to burial by growing upwards with long internodes. In Acacia thickets in spite of very little sand deposition, plants were vigorous with little or no dead material, produced stolons and grew upwards with some long and some short internodes, probably because of greater nitrogen content in the soil. However, in the swale (slack) with little or no sand deposition, plants showed strong clumping tendency with very short internodes, a large amount of dead material on the surface and very low vigour. Unburied nodes usually died. Similarly, in the stable sand dunes with little or no sand deposition debilitated low-vigour clumps with very few stolons were abundant. Another example of this decline was presented by Martin (1959) on a shoreline along the Atlantic coast of North Carolina. He measured deposition and deflation of sand on two transects and showed that as one moved inland from the shoreline the total deposition of sand decreased.
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Knicker, Heike, and Rüdiger Fründ. "Characterization of Nitrogen in Plant Composts and Native Humic Material by Natural-Abundance 15N CPMAS and Solution NMR Spectra." In Nuclear Magnetic Resonance Spectroscopy in Environment Chemistry. Oxford University Press, 1997. http://dx.doi.org/10.1093/oso/9780195097511.003.0022.

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Soil organic matter (SOM) provides one of the major deposits for carbon and nitrogen on the surface of the Earth. It is continuously produced, mainly from dead plant material, by composting and humification processes. During these processes microorganisms thoroughly convert the starting material, which consists mostly of insoluble lignocelluloses. The end products of these processes in average middle-European soils, that contain typically 1 to 5% w/w of organic material, are clay–SOM complexes which are insoluble in all the usual organic and inorganic solvents. The standard aqueous sodium hydroxide extraction procedure dissolves at most 40% of the total organic carbon in all the soils tested by our group. The insoluble majority, the humin fraction, remains as poorly defined aluminosilicate- SOM complexes. During the decomposition and conversion processes the carbon to nitrogen ratio–decreases. Compared to the starting material, SOM is enriched in nitrogen. Under natural conditions, i.e., without the artificial addition of nitrogen in the form of manure or fertilizer, SOM provides the major part of the nitrogen available for plant growth. The chemical characterization of this ubiquitous but ill-defined material has only been partly successful until now. For characterization of the organic carbon in complete soils and extracts, nuclear magnetic resonance (NMR) methods appear to be most promising, especially since the application of high-resolution solid-state methods has become almost a laboratory routine. The combination of proton–carbon cross polarization with high-speed magic angle rotation (the CPMAS technique) permits the study of complete native soils, and thus provides detailed information about the gross chemical structure of the total SOM, without introducing any of the chemical modifications that could result from aggressive chemical extraction procedures. It has been shown by 13C CPMAS and high-resolution (HR) solution 13C NMR studies of a series of typical European soils, in which the concentration of paramagnetic metal ions was fairly low and which contained humic material with an aromatic carbon content ≤20%, that the carbon could be quantitatively assigned. The measurement of the 13C CPMAS spectra of complete native soils with a carbon content in the region of 1 % w/w is rather instrument-time consuming, and appeared to be at the limit of sensitivity.
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Actas de conferencias sobre el tema "Soils Australia Nitrogen content"

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Lehane, Barry M., J. Antonio H. Carraro, Nathalie Boukpeti, and Sarah Elkhatib. "Mechanical Response of Two Carbonate Sediments From Australia’s North West Shelf." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23340.

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The carbonate sediments found offshore on the North West Shelf of Australia can generally be described as silts with varying proportions of clay-sized and sand-sized carbonate particles. This paper investigates the undrained shearing response (as measured under simple shear and triaxial conditions) of two sediments with different grading curves. The importance of the fines content in controlling the density and hence dilatancy and undrained strength of the materials is demonstrated. The paper discusses the importance of fabric to the behavior of these soils and provides guidance on how undrain
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ADAMOVICS, Aleksandrs, and Liena POIŠA. "EVALUATION OF CHEMICAL CONTENT IN DIFFERENT ENERGY CROPS." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.143.

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For energy crops (reed canary grass and timothy grass), it is important to evaluate the sulphur and carbon content, and the harvested dry matter dependency on the fertilizer norm. Sulphur and carbon are important elements of a combustible material, and carbon is directly important as it forms the burning component. On the other hand, sulphur is an unwelcome element in combustible materials as it promotes environmental pollution. The field trials were carried out in sod calcareous soils in 2011–2013. A research was conducted to investigate the chemical content of two grasses: reed canary grass
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