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Tesi sul tema "Sodic soils"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Harris, Mark Anglin. "The effects of green manure on soil structure in calcareous sodic and non-sodic soils /." Title page, Contents and Summary only, 1995. http://web4.library.adelaide.edu.au/theses/09A/09ah315.pdf.

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2

Odell, Simon Paul. "Microbial reclamation of alkaline sodic soils /." Title page, contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09ASOP/09asopo23.pdf.

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3

Nelson, Paul Netelenbos. "Organic matter in sodic soils : its nature, decomposition and influence on clay dispersion." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phn4281.pdf.

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Bibliography: leaves 147-170. Aims to determine the influence of sodicity on the nature and decomposition of organic matter; and the influence of organic matter and its components on the structural stability of sodic soils.

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4

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

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

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5

Grieger, Gayle. "The effect of mineralogy and exchangeable magnesium on the dispersive behaviour of weakly sodic soils /." Title page, table of contents and abstract only, 1999. http://web4.library.adelaide.edu.au/theses/09PH/09phg8478.pdf.

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6

Barzegar, Abdolrahman. "Structural stability and mechanical strength of salt-affected soils." Title page, contents and abstract only, 1995. http://web4.library.adelaide.edu.au/theses/09PH/09phb296.pdf.

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Copies of author's previously published articles in pocket inside back cover. Bibliography: leaves 147-160. This thesis outlines the factors affecting soil strength and structural stability and their interrelationship in salt-affected soils. The objectives of this study are to investigate the influence of clay particles on soil densification and mellowing, the mellowing of compacted soils and soil aggregates as influenced by solution composition, the disaggregation of soils subjected to different sodicities and salinities and its relationship to soil strength and dispersible clay and the effec

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7

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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8

Chorom, Mostafa. "Behaviour of alkaline sodic soils and clays as influenced by pH and particle change." Title page, contents and abstract only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phc551.pdf.

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Copies of author's previously published articles inserted. Bibliography: leaves 173-196. The objective of this thesis is to investigate the factors affecting swelling and dispersion of alkaline sodic soils containing lime and the ways to manage these soils to improve their physical condition. Studies on pure clay systems are included to understand the fundamental process involved in swelling and dispersion of pure and soil clays.

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9

Suriadi, Ahmad. "Structural stability and Na-Ca exchange selectivity of soils under sugarcane trash management." Title page, Contents and Abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09ASOM/09asoms961.pdf.

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10

Nawar, Niman K. "Reclamation of saline-sodic soils by poly (vinyl alcohol)." Thesis, University of Salford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258170.

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11

Breker, Maria Christine. "Influence of Amendments on Chemical and Biological Properties of Sodic Soils." Thesis, North Dakota State University, 2016. https://hdl.handle.net/10365/28268.

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Improving productivity of sodic soils has become a concern in North Dakota because of the desire for more land for producing crops. Field and incubation studies were conducted to determine the impacts of different amendments (flue-gas desulfurization gypsum, sugar beet processing by-product lime, and langbeinite) on the chemical and biological properties of two sodic soils. The field study evaluated the amendment effects on the chemical conditions of the soil and the impact on alfalfa yield and quality. Differences were not observed in percent sodium (%Na) in the first 17 months and alfalfa yi

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12

Armstrong, Andrew Shaw Braidwood. "Salt and water dynamics in saline and sodic clay soils." Thesis, University of Southampton, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.330126.

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13

Misra, Dinesh. "Early tree-soil-root relationships of Prosopis, Eucalyptus, and Azadirachta planted on sodic soils." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0026/MQ50395.pdf.

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14

Johnston, Christopher R. "Soil chemical and physical changes resulting from irrigation with coalbed natural gas co-produced water effects of soil amendments and water treatments /." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1445033651&sid=10&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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15

Hoyningen, Huene Bernhard von. "Subirrigation of maize using saline-sodic water." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41782.

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A field subirrigation experiment, using saline-sodic water, was carried out on a loamy sand soil in southwestern Quebec. The experimental field was divided into 16 plots with 4 treatments; saline-sodic water, "fresh" water, controlled drainage and non-irrigated. Each treatment had four replicates. Maize yield, hydraulic conductivity, salt concentration, and salt movement through the soil were recorded in all plots.<br>No significant difference in maize yield occurred between plots irrigated with saline-sodic or fresh water in any of the three years. Irrigated maize plots yielded approximately

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16

Gebrekidan, Heluf Tedla. "Evaluation of the potential use of langbeinite (potassium sulfate / magnesium sulfate) as a reclaiming material for sodic and saline sodic soils." Diss., The University of Arizona, 1995. http://hdl.handle.net/10150/187424.

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Soil sodicity/salinity and scarcity of water are important constraints of agricultural development in arid lands. Excessive exchangeable sodium of sodic and saline sodic soils cause swelling of clays and dispersion of colloidal particles, and results in poor soil-water-air relationships. Reclaiming sodic and saline sodic soils involves the displacement of exchangeable sodium and its subsequent leaching from the root zone. This further depends upon the choice of chemical or cation to exchange for sodium and the quality and availability of water for leaching. Therefore, a series of experiments i

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17

Dikinya, Oagile. "The effects of self-filtration on saturated hydraulic conductivity in sodic sandy soils." University of Western Australia. School of Earth and Geographical Sciences, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0051.

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[Truncated abstract] Self-filtration is here defined as particle detachment and re-deposition causing re-arrangement of the particles and therefore pore space which affects water flow in soil by decreasing hydraulic conductivity. This is of particular important in soils which are susceptible to structural breakdown. The objective of this thesis was to examine the dynamics of the self-filtration process in sodic sandy soils as affected by ionic strength and soil solution composition. The temporal changes of hydraulic conductivity and the elution of fine particles from soil columns were used as

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18

Dikinya, Oagile. "The effects of self-filtration on saturated hydraulic conductivity in sodic sandy soils /." Connect to this title, 2006. http://theses.library.uwa.edu.au/adt-WU2007.0051.

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19

Alfatesh, Ibrahim Yahya 1956. "Sodium, calcium, and magnesium changes in soils upon application of saline-sodic waters." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/191889.

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The purpose of this research was to study the effects of different types and amount of saline-sodic waters on the cation concentration changes in solution extracts, drainage waters, and on the exchange complex of two soils differing in their textures, exchange properties, and lime content. The composition of solution extracts, drainage waters and exchange phases of both soils was closely related to the cationic composition of the irrigation waters. Salt accumulation in the soils increased with increasing salinity of the applied water. Salts were distributed uniformally with depth after 8 and 1

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20

Marwan, M. M. "Changes in physical and chemical properties of saline-sodic soils during removal of salts by leaching with water." Thesis, University of Reading, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234663.

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21

Bhojvaid, Padam Parkash. "Dynamics of soil-plant relationships after afforestation of sodic soils with Prosopis juliflora, Swartz DC, in Haryana, India." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ35112.pdf.

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22

Jayasekera, Samudra. "An investigation into modification of the engineering properties of salt affected soils using electrokinetics." Thesis, University of Ballarat, 2008. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/34198.

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Soil salinity (due to ingress of excess amounts of dissolved salts in soil pores) and soil sodicity (due to excess amounts of sodium ions attached to the clay surface) are significant forms of land degradation in many parts of the world in particular in arid and semi arid regions. In Australia, soil salinity has long been identified as the major form of land degradation and the greatest environmental threat. Saline soils cover almost 6% of Australia’s land mass and impose severe threats on agricultural productivity and built infrastructure with an estimated annual loss of $250 million. In rece

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23

Jayasekera, Samudra. "An investigation into modification of the engineering properties of salt affected soils using electrokinetics." University of Ballarat, 2008. http://archimedes.ballarat.edu.au:8080/vital/access/HandleResolver/1959.17/15710.

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Soil salinity (due to ingress of excess amounts of dissolved salts in soil pores) and soil sodicity (due to excess amounts of sodium ions attached to the clay surface) are significant forms of land degradation in many parts of the world in particular in arid and semi arid regions. In Australia, soil salinity has long been identified as the major form of land degradation and the greatest environmental threat. Saline soils cover almost 6% of Australia’s land mass and impose severe threats on agricultural productivity and built infrastructure with an estimated annual loss of $250 million. In rece

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24

Amini, Sevda. "Carbon Dynamics in Salt-Affected Soils." Thesis, Griffith University, 2015. http://hdl.handle.net/10072/366584.

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Salt-affected soils are soils with high concentrations of dissolved mineral salts in their profiles to the extent that such dissolved salts adversely affect crop production. Globally 75 countries have been recognized as having vast areas of salt-affected lands. Australia, United States, Turkey, India, Iran, Iraq, Mexico, Syria, Pakistan, and China are countries with serious salinity problems. In a recent estimate, nearly 831 million hectares of land are salt-affect worldwide. Salt-affected soils mostly exist in arid and semiarid regions of the world and many salt-affected wastelands have been

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25

Sessoms, Holly Nicol. "Water use potential and salt tolerance of riparian species in saline-sodic environments." Thesis, Montana State University, 2004. http://etd.lib.montana.edu/etd/2004/sessoms/SessomsH0805.pdf.

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26

Muller, Felicity. "The effect of sodicity severity and depth on irrigated cotton production at Hillston, New South Wales." Thesis, Faculty of Agriculture, Food & Natural Resources, 2006. http://hdl.handle.net/2123/912.

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27

Wamono, Anthony Walekhwa. "Effects of Calcium Based Surface Amendments on Hydraulic Conductivity and Selected Physical Properties of Subsurface Drained Sodic Soils." Diss., North Dakota State University, 2016. http://hdl.handle.net/10365/25661.

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Managing excess soil water in agricultural fields in the Northern Great Plains through subsurface drainage increases the risk of sodification in high-risk soils. Leaching sodic soils with low electrical conductivity (EC) water, rainfall, may result in the swelling of soil, dispersion of clay particles and consequently the breakdown of soil structure leading to changes in physical and mechanical properties of soils (e.g., reduced infiltration, hard-setting and reduced trafficability). In this dissertation, the effectiveness of calcium amendments of gypsum and spent lime, a byproduct of the proc

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28

Wentworth, Fitzwilliam Stephen Neville. "Improving the sustainability of irrigated maize (Zea mays) on sodic soils in the Lachlan Valley of New South Wales." Thesis, The University of Sydney, 2001. https://hdl.handle.net/2123/27799.

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In recent years, the expression “Sustainable Agriculture” has entered public discourse on social, economic, and ecological issues, especially in the context of analysing the negative effects of certain crop production practices. For example, efficient irrigation is now essential due to the ever-changing political environment in respect to water access. Furthermore, interest in alternative weed control methods has grown with an emphasis on reducing tillage and pesticide use. To achieve a sustainable agro-industry, new systems for crop production must be found. One such system, for irri

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29

PESSOA, Luiz Guilherme Medeiros. "Analysis of salt affected soils in semiarid landscapes of Pernambuco, Brazil." Universidade Federal Rural de Pernambuco, 2012. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/5229.

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Submitted by (lucia.rodrigues@ufrpe.br) on 2016-08-09T12:17:47Z No. of bitstreams: 1 Luiz Guilherme Medeiros Pessoa.pdf: 2744697 bytes, checksum: 2d9e9d6369481163d66a09044aa1bede (MD5)<br>Made available in DSpace on 2016-08-09T12:17:47Z (GMT). No. of bitstreams: 1 Luiz Guilherme Medeiros Pessoa.pdf: 2744697 bytes, checksum: 2d9e9d6369481163d66a09044aa1bede (MD5) Previous issue date: 2012-12-20<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>The sodification and salinization of soil are the main types of degradation of semiarid of Pernambuco. In extreme cases,

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30

King, Lyle A. "Land application with saline-sodic coalbed natural gas co-produced waters in Wyoming's Powder River Basin impacts to soil and biological properties /." Laramie, Wyo. : University of Wyoming, 2006. http://proquest.umi.com/pqdweb?did=1221694361&sid=3&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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31

Nascimento, Alexandre Ferreira do. "Relações pedologia-geomorfologia-sedimentologia no Pantanal Norte." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-06072012-103745/.

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As relações entre os solos, material de origem e feições geomórficas são importantes para a compreensão da distribuição dos solos na paisagem e o entendimento de sua variabilidade espacial, sobretudo em ambientes úmidos (wetlands) de natureza sedimentar complexa. Procurou-se descrever e caracterizar os ambientes deposicionais de uma área de estudo, a Reserva Particular do Patrimônio Natural (RPPN) SESC Pantanal, buscando na sedimentologia e na geomorfologia que sistemas deposicionais e/ou erosivos formaram a paisagem e dessa forma interpretar as alterações ocorridas no relevo e nos sedimentos

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32

Silvertooth, J. C. "Saline and Sodic Soil Identification and Cotton Management." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/147010.

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33

Leal, Rafael Marques Pereira. "Efeito da irrigação com efluente de esgoto tratado em propriedades químicas de um latossolo cultivado com cana-de-açúcar." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-02072007-112919/.

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Já há muito tempo, a irrigação de cultivos agrícolas é praticada e considerada uma alternativa interessante e útil à disposição dos efluentes gerados pelas estações de tratamento de esgoto doméstico. Como qualquer outro resíduo, o uso agrícola implica em algumas vantagens, tais como o fornecimento contínuo de umidade e de determinados nutrientes, mas também desvantagens, ocasionando a adição de sais e de possíveis patógenos e contaminantes orgânicos. Apesar da utilização de efluente de esgoto tratado ser parte integrante da gestão hídrica em muitos países, até o presente momento não se conhece

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34

Speirs, Simon Douglas. "Characterising soil structural stability and form of sodic soil used for cotton production." Thesis, The University of Sydney, 2006. http://hdl.handle.net/2123/5817.

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In eastern Australia, Vertosols are widely utilised for the production of irrigated cotton (Gossypium hirsutum) due to their inherent fertility and large water–holding capacity. However, irrigated agriculture in eastern Australia is faced with a decline in the availability of good quality irrigation water sources i.e. waters with low electrolyte concentrations and small Na+ contributions. Consequently, alternative water resources that contain larger contributions of Na+ are becoming increasingly relevant as potential irrigation sources. It is known that the application of Na+ rich waters as ir

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Speirs, Simon Douglas. "Characterising soil structural stability and form of sodic soil used for cotton production." Faculty of Agriculture, Food and Natural Resources, 2006. http://hdl.handle.net/2123/5817.

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Doctor of Philosophy(PhD)<br>In eastern Australia, Vertosols are widely utilised for the production of irrigated cotton (Gossypium hirsutum) due to their inherent fertility and large water–holding capacity. However, irrigated agriculture in eastern Australia is faced with a decline in the availability of good quality irrigation water sources i.e. waters with low electrolyte concentrations and small Na+ contributions. Consequently, alternative water resources that contain larger contributions of Na+ are becoming increasingly relevant as potential irrigation sources. It is known that the applica

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36

Udy, Sandra. "Assessing Amendment Treatments for Sodic Soil Reclamation in Arid Land Environments." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7670.

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Plugged and abandoned well pads throughout the Uintah Basin face reclamation challenges due to factors including a harsh climate, invasive species, and high salt loads. Finding ways to alleviate soil sodicity could improve soil reclamation success. Gypsum, sulfur, activated carbon, and Biochar are being applied to improve soil parameters negatively impacted by sodicity, but the direct impact of these amendments on Uintah Basin soils is still largely unknown. The aim of this study was two-fold. (1) Evaluate the effectiveness of gypsum, sulfuric acid, Biochar, activated carbon, and combinations

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37

Jassogne, Laurence. "Characterisation of porosity and root growth in a sodic texture-contrast soil." University of Western Australia. School of Plant Biology, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0092.

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In Australia a class of soils known as sodic duplex soils covers approximately 20% of the continent. Their defining characteristic is a sharp texture contrast between the A (or E) and B horizon. The upper B horizon at the point of contact with the E horizon is often highly sodic and of such a high strength that root growth and proliferation, water conductivity, aeration, water storage and water uptake are restricted. Roots growing in these soils rely on channels created by previous roots or cracks arising from shrink swell forces associated with seasonal wetting and drying. It has been sugges

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Bailey, Danielle L. H. "Properties of soil profiles over sodic mine spoil 16 years after construction." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ60410.pdf.

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Alsharari, Musaed Amish. "Reclamation of fine-textured sodic soil using gypsum, langbeinite, and calcium chloride." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/282872.

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The effects of various application rates of gypsum (Aqua-cal = finely ground gypsum), langbeinite (K₂SO₄.2MgSO₄), and CaCl₂ (anhydrous) on exchangeable Na removal and saturated hydraulic conductivity of a sodic soil were investigated under laboratory batch studies and laboratory column leaching studies. The research involved four phases of studies. Characterization of the soil and irrigation water indicated that the soil sample is sodic (ESP=35.3), ECₑ = 3.36 dS/m), and the irrigation water is moderately saline (EC = 2.2 dS/m). The laboratory batch studies showed that CaCl₂ and langbeinite tre

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40

Ezlit, Younes Daw. "Modelling the change in conductivity of soil associated with the application of saline-sodic water." University of Southern Queensland, Faculty of Engineering and Surveying, 2009. http://eprints.usq.edu.au/archive/00006387/.

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[Abstract]: Scarcity of fresh water has led to use of low quality waters (high sodicity and salinity) that were considered unsuitable for irrigation in the past. Mismanagement of irrigation using this water can increase the potential for soil degradation and limit crop production in the long term. Irrigation using highly saline-sodic water requires appropriate management to avoid long term development of sodicity and salinity problems. The main factors that control the sodicity and salinity problems are maintenance of sufficientleaching and avoidance of soil structure degradation due to sodici

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41

He, Yangbo. "Sodic Soil Swelling and Dispersion and their Implications for Water Movement and Management." Diss., North Dakota State University, 2014. https://hdl.handle.net/10365/27543.

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North Dakota has over 1.9 million ha of sodium-affected soils, influencing water movement and crop production. This dissertation consists of four studies examining different aspects of sodic soils. The first study surveys sodium adsorption ratio (SAR) methods to determine which is the most reliable. The second and third studies investigate the dispersion and swelling functions of sodic soils. The final study examines field spatial distribution of Na in order to propose management strategies. Analytical approaches for converting alternative to standard approaches are needed. The SAR was determi

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42

AragÃo, Ana Paula Bezerra. "Techno-economical analysis of the reclamation of a sodic soil in the Irrigated Perimeter Curu-Pentecoste-CE." Universidade Federal do CearÃ, 2010. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=5281.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>No Nordeste semi-Ãrido, as maiores incidÃncias de Ãreas salinizadas sÃo observadas nas terras intensamente cultivadas com o uso da irrigaÃÃo nos PerÃmetros Irrigados, sobretudo aqueles com o mÃtodo por superfÃcie. O experimento foi realizado no NÃcleo D do PerÃmetro Irrigado Curu-Pentecoste - CE. A pesquisa teve como objetivo avaliar o efeito da subsolagem do solo associada com tratamentos quÃmicos e biolÃgicos, na melhoria das condiÃÃes de transmissÃo de Ãgua no perfil do solo, de atributos fÃsicos e quÃmicos do solo, na produti

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43

Santos, Alex Paulus Ribeiro dos. "Efeito da irrigação com efluente de esgoto tratado, rico em sódio, em propriedades químicas e físicas de um argissolo vermelho distrófico cultivado com capim-Tifton 85." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-27092004-165932/.

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A escassez natural de água doce no mundo tem sido agravada pela poluição dos cursos de água. Os sistemas de tratamento de esgotos geram resíduos, dentre eles, o efluente de esgoto tratado, que quando lançado em rios, tem causado impacto ambiental. O uso do efluente de esgoto tem sido considerado uma prática importante para minimizar os impactos negativos aos corpos dágua, sendo que o uso agrícola tem ganhado popularidade em muitos países. Além de se constituir em fonte de água para culturas agrícolas e florestais, o efluente possui elementos essenciais para a nutrição de plantas. No en

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Harris, Mark Anglin. "The effects of green manure on soil structure in calcareous sodic and non-sodic soils." 1996. http://web4.library.adelaide.edu.au/theses/09A/09ah315.pdf.

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45

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

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Abstract (sommario):

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

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46

Grieger, Gayle. "The effect of mineralogy and exchangeable magnesium on the dispersive behaviour of weakly sodic soils." Thesis, 1999. http://hdl.handle.net/2440/19524.

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47

Barzegar, Abdolrahman. "Structural stability and mechanical strength of salt-affected soils / by Abdolrahman Barzegar." Thesis, 1995. http://hdl.handle.net/2440/18670.

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Abstract (sommario):

Copies of author's previously published articles in pocket inside back cover.<br>Bibliography: leaves 147-160.<br>xvi, 160 leaves, [6] leaves of plates : ill. ; 30 cm.<br>This thesis outlines the factors affecting soil strength and structural stability and their interrelationship in salt-affected soils. The objectives of this study are to investigate the influence of clay particles on soil densification and mellowing, the mellowing of compacted soils and soil aggregates as influenced by solution composition, the disaggregation of soils subjected to different sodicities and salinities and its r

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48

Chorom, Mostafa. "Behaviour of alkaline sodic soils and clays as influenced by pH and particle change / Mostafa Chorom." Thesis, 1996. http://hdl.handle.net/2440/18887.

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Abstract (sommario):

Copies of author's previously published articles inserted.<br>Bibliography: leaves 173-196.<br>xviii, 197 leaves : ill. (some col.) ; 30 cm.<br>The objective of this thesis is to investigate the factors affecting swelling and dispersion of alkaline sodic soils containing lime and the ways to manage these soils to improve their physical condition. Studies on pure clay systems are included to understand the fundamental process involved in swelling and dispersion of pure and soil clays.<br>Thesis (Ph.D.)--University of Adelaide, Dept. of Soil Science, 1996

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49

Fotovat, A. "Chemistry of indigenous Zn and Cu in the soil-water system : alkaline sodic and acidic soils / by Amir Fotovat." 1997. http://hdl.handle.net/2440/19068.

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Abstract (sommario):

Copies of author's previously published articles inserted.<br>Bibliography: leaves 195-230.<br>xx, 320 leaves : ill. (some col.) ; 30 cm.<br>Title page, contents and abstract only. The complete thesis in print form is available from the University Library.<br>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.<br>Thesis (Ph.D.)

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50

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

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Abstract (sommario):

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

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