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Dissertations / Theses on the topic 'Soil profiles'

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1

Jones, Edward. "Proximal sensing in soil profiles." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/18722.

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Objective and quantitative soil information is crucial for pedological investigations and to inform diverse decision making processes. New techniques are required so that soil information can be ascertained in a timely manner to support sampling at finer spatial and temporal resolutions. Currently, no single technique can provide information on all of the properties of interest. This research investigated the conjoint use of visible near-infrared diffuse reflectance spectroscopy (VisNIR) and portable X-ray fluorescence spectroscopy (pXRF) for the in situ investigation of soil properties, profi
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2

Eaton, Frank Edward. "Generation of predetermined soil profiles in a soil bin." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/290268.

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The soil preparation in soil bins must be capable of generating a number of soil density profiles varying from uniform to heavily compacted layers lying below more friable soil. A subsurface rotating rod firmed the soil beneath the rod and repeated passes produced desired profiles. Retrofitting the existing instrumentation with virtual instrumentation methods resulted in measurements that were more precise and improved repeatability. A Wheatstone bridge force transducer measured Cone Index pressure as a function of soil penetration depth. Soil surface elevation and implement depths were locate
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3

Wickremesinghe, Damika Sampath. "Statistical characterization of soil profiles using in situ tests." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/29319.

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Several statistical procedures that would enhance the site characterization capabilities of insitu test data with special emphasis on the cone penetrometer test have been proposed and presented. Two methods to identify different soil layers from a profile have been described. One of these procedures is based on the effects of the individual parameters, namely, cone bearing, sleeve friction and pore pressure, while the other method employs a multivariate scheme of analysis, which has the capability of handling all three or any two parameters, simultaneously. The advantages of these statistical
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4

Ketteringham, Wayne Stuart. "Transient flow of water in saturated-unsaturated soil profiles." Master's thesis, University of Cape Town, 1990. http://hdl.handle.net/11427/8296.

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Includes bibliography.<br>In this thesis tile transient flow of water, during tile drainage process in saturated-unsaturated soil profiles, was studied. Drainage experiments were performed on two different soil profiles. The first experiment undertaken was tile drainage of a vertical column of sand. This experiment was performed on two sands of differing grain size and grading. The second experiment undertaken was the drainage towards a well from a wedge of sand (cake slice) using yet a different coarse sand.
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5

Lorz, C. "Ein substratorientiertes Boden-Evolutions-Konzept für geschichtete Bodenprofile : Genese und Eigenschaften von lithologisch diskontinuierlichen Böden /." Berlin : Gebrüder Borntraeger, 2008. http://d-nb.info/987000470/04.

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6

Timmenga, Hubert J. "The transport of mineral and organic matter into the soil profile by Lumbricus rubellus Hoffmeister." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/27551.

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The biology and ecology of the earthworm Lumbricus rubellus Hoffmeister, 1843, and its effects on the turn-over of organic matter and soil are not well known. To gather this information, the ingestion and egestion rates were measured using a litterbag technique and the transport of organic matter was quantified with a newly developed method, using soil columns to which ¹⁴C labelled plant material was added. The feeding habits of the worm were positively influenced by temperature in wet soils (> -15m of water) and were negatively influenced in dry soil (< -15 m of water). The total egestion ra
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7

Jafarzadeh, Aliasghar. "Experimental studies of gypsum migration and deposition in soil profiles." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46842.

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8

Henderson, Rachel A. "Partitioning Soil CO2 Efflux through Vertical Profiles of Manipulated Forests in MOFEP." University of Toledo / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1177701393.

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9

Schaap, James Cornelis. "Nitrogen fertilization and tree species effect on the soil microbial communities and consequences for soil carbon." Thesis, University of Canterbury. School of Biological Sciences, 2011. http://hdl.handle.net/10092/6582.

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In the face of ever increasing atmospheric CO₂ a better understanding of soil properties and processes and the effect of management practices, such as the application of nitrogen fertilizer is of importance and could potentially improve our ability to sustainably manage forestry systems. With that in mind this study was conducted in order to investigate the effects of tree species and fertilization on soil carbon and the soil microbial community. To this end, soil from fertilized and unfertilized plots at Berwick forest, under stands of Pinus radiata and Sequoia sempervirens at Hanmer and und
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10

He, Qingping. "Interpretation of fallout radionuclide profiles in sediments from lake and floodplain environments." Thesis, University of Exeter, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358000.

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11

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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12

Henderson, Rachel. "Partitioning soil CO₂ efflux through vertical profiles of manipulated forests in MOFEP /." Connect to Online Resource-OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=toledo1177701393.

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13

Becker, Rolf [Verfasser]. "Spatial time domain reflectometry for monitoring transient soil moisture profiles / Rolf Becker." Karlsruhe : Inst. für Wasser und Gewässerentwicklung, 2004. http://d-nb.info/100165093X/34.

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14

Qian, Leilei. "Evaluation of Antibiotic Resistance Profiles of Enteric Bacteria in Swine Feces Before and After Lagoon Treatment." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-05082007-161836/.

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Antibiotics are used in livestock production for the treatment of diseases and for improvement of feed efficiency and growth. However, agricultural use of antibiotics may be partly responsible for the emergence of antibiotic-resistant organisms. Large amounts of managed manure are land applied, which opens the door for the spread of antibiotic resistance in the environment. Thus, the goal of this project was to evaluate the effects of lagoon treatment on the persistence of antibiotic resistant enteric bacteria isolated from swine feces. Both cool season and warm season samples were collected f
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15

Koch, Maximilian [Verfasser]. "Phosphorus forms in fertilized arable soil profiles and related 33P uptake / Maximilian Koch." Bonn : Universitäts- und Landesbibliothek Bonn, 2019. http://d-nb.info/119900541X/34.

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16

Kupar, James J. "Groundwater effects of land applied alum residuals." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-11072008-063235/.

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17

Shayo-Ngowi, A. J. "The hydrology of soil profiles as affected by long term treatment on Palace Leas hay meadow plots." Thesis, University of Newcastle Upon Tyne, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234429.

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18

Hamad, Muawia El-Bedawi. "Phosphorus interactions with some calcareous soils from the Sudan." Thesis, University of Newcastle Upon Tyne, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.346441.

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19

Ekanayake, Jagath C. "Soil water movement through swelling soils." Lincoln University, 1990. http://hdl.handle.net/10182/1761.

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The present work is a contribution to description and understanding of the distribution and movement of water in swelling soils. In order to investigate the moisture distribution in swelling soils a detailed knowledge of volume change properties, flow characteristics and total potential of water in the soil is essential. Therefore, a possible volume change mechanism is first described by dividing the swelling soils into four categories and volume change of a swelling soil is measured under different overburden pressures. The measured and calculated (from volume change data) overburden potentia
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20

Bernal, Blanca. "Carbon Pools And Profiles In Wetland Soils: The Effect Of Climate And Wetland Type." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1218226611.

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21

Morris, Stephen Michael. "The use of phospholipid fatty acid profiles to determine the diversity of soil microbial communities of managed woodland stands." Thesis, University of East London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365987.

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22

Frohne, Tina [Verfasser]. "Mobilization of metals as influenced by redox potential in slurries of floodplain soil material and biogeochemical fractionation of mercury in floodplain soil profiles / Tina Frohne." Wuppertal : Universitätsbibliothek Wuppertal, 2014. http://d-nb.info/1054199906/34.

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23

Abu, Abdul. "Sequestration of selected aromatic compounds in low organic matter soil : relating partition characteristics to thermal desorption profiles." Thesis, King's College London (University of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406459.

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24

Turner, Stephanie [Verfasser]. "Microbial communities and microbial nitrogen cycling in soil depth profiles over 120,000 years of ecosystem development / Stephanie Turner." Hannover : Technische Informationsbibliothek (TIB), 2018. http://d-nb.info/1152965921/34.

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25

劉, 衛., Wei LIU, 純. 森泉, et al. "Depth Profiles of Radiocarbon and Carbon Isotopic Compositions of Organic Matter and CO_2 in a Japanese Forest Area((2)Summaries of Research Using AMS)." 名古屋大学年代測定資料研究センター, 2006. http://hdl.handle.net/2237/13664.

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26

Arfstrom, John David. "A model of the hydrothermal system at Casa Diablo in Long Valley, California, based on resistivity profiles and soil mercury analyses." FIU Digital Commons, 1993. http://digitalcommons.fiu.edu/etd/1306.

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A description and model of the near-surface hydrothermal system at Casa Diablo, with its implications for the larger-scale hydrothermal system of Long Valley, California, is presented. The data include resistivity profiles with penetrations to three different depth ranges, and analyses of inorganic mercury concentrations in 144 soil samples taken over a 1.3 by 1.7 km area. Analyses of the data together with the mapping of active surface hydrothermal features (fumaroles, mudpots, etc.), has revealed that the relationship between the hydrothermal system, surface hydrothermal activity, and mercur
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27

Bailey, Jonathan Pqul. "Development of shear wave velocity profiles in the deep sediments of the Mississippi Embayment using surface wave and spectral ratio methods." Diss., Columbia, Mo. : University of Missouri-Columbia, 2008. http://hdl.handle.net/10355/5635.

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Thesis (M.S.)--University of Missouri-Columbia, 2008.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 10, 2009 Includes bibliographical references.
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28

Bhople, Parag [Verfasser]. "Effects of climate change on fungal community structure and organic matter turnover in soil profiles along elevation gradients in alpine ecosystems / Parag Bhople." Kassel : Universitätsbibliothek Kassel, 2020. http://d-nb.info/1214841066/34.

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29

Metzner, Ines. "Zur Geochemie ausgewählter Bodenformen im Erzgebirge und Vogtland." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2011. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-64364.

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Die geochemischen Verhältnisse der Böden des Erzgebirge und Vogtlandes werden auf der Grundlage der komplexen geochemischen Analyse von ausgewählten, flächenrepräsentativen Bodenprofilen auf Hauptgesteinen des Untersuchungegebietes charakterisiert. Die Wirkungsweisen vorhandener Einflussfaktoren (Gesteinschemismus, Bodengenese, Bodennutzung) werden untersucht und bewertet. Die Untersuchungen stellen eine Grundlage für die Ableitung von geologisch bedingten regionalen Hintergrundbelastungen dar<br>A characterization of the soil geochemistry of the Erzgebirge and Vogtland Regions (Saxony) is pro
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30

Ferreira, Sandra Regina. "Análise pedoestratigráfica das formações Rio Claro e Piraçununga, no Centro-Leste do Estado de São Paulo /." Rio Claro : [s.n.], 2005. http://hdl.handle.net/11449/102868.

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Resumo: Neste trabalho são analisados perfis de solo das formações Rio Claro e Piraçununga, na região dos municípios homônimos, com relação às características morfológicas, granulométricas e mineralógicas, com vistas ao entendimento de sua evolução. A partir destas informações e aplicando a técnica de pedoestratigrafia, foi possível estabelecer a ocorrência de uma Unidade Pedoestratigráfica, soterrada por arenitos fluviais das formações estudadas. Os principais minerais encontrados nos perfis de solo são quartzo e caulinita, secundariamente gibsita, clorita, óxidos e hidróxidos de ferro e traç
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31

Fülöp, Réka-Hajnalka. "Quantifying the magnitude and timing of Holocene soil erosion events on parent materials of known age using in-situ cosmogenic C-14 and Be-10 depth-profiles." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3358/.

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Conventional methods for the determination of past soil erosion provide only average rates of erosion of the sediment's source areas and are unable to determine the rate of at-a-site soil loss. This study addresses this issue by exploring the extent to which in situ cosmogenic Be-10 and C-14 depth-profiles can be used to quantify the magnitude and timing of site-specific soil erosion events on soils of known age. The study focuses on two sites located on end moraines of the Loch Lomond Readvance (LLR) in Scotland: Wester Cameron and Inchie Farm, both near Glasgow. The LLR is well documented an
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32

Merkley, Brett J. "Sources and Pathways of Lead Contamination in Urban Community Gardens in Toledo, Ohio." Bowling Green State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1555621213052896.

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33

Ferreira, Sandra Regina [UNESP]. "Análise pedoestratigráfica das formações Rio Claro e Piraçununga, no Centro-Leste do Estado de São Paulo." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/102868.

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Made available in DSpace on 2014-06-11T19:32:17Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-10-06Bitstream added on 2014-06-13T18:43:29Z : No. of bitstreams: 1 ferreira_sr_dr_rcla.pdf: 9229845 bytes, checksum: 94c7f5d9a6e17d171ba1642e654d089e (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Neste trabalho são analisados perfis de solo das formações Rio Claro e Piraçununga, na região dos municípios homônimos, com relação às características morfológicas, granulométricas e mineralógicas, com vistas ao entendimento de sua evolução. A partir destas infor
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34

Vaillant, Grace C. "Nutrient cycling at cattle feedlots field & laboratory study." Thesis, Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/318.

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35

O'Brien, Patricia Ann, and patricia o'brien@rmit edu au. "COncepts and costs for the maintenance of productive capacity: a study of the measurement and reporting of soil quality." RMIT University. Accounting and Law, 1999. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20040930.170346.

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This thesis studies the role accounting plays in the monitoring and reporting of soil quality in one sector of the agricultural industry, broadacre farming. A survey was conducted with broadacre farmers in the Loddon Catchment, Victoria, Australia. The primary aim was to determine the effectiveness accounting plays in providing information to decision makers relative to the productive capacity in soil quality and not just on profits. The capital asset in this study was defined as soil quality. Soils and soil quality in particular, are major elements in determining land value. The concern
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36

Anne, Cheikh Amadou Tidiane [Verfasser], Jürgen [Akademischer Betreuer] Runge, and Jürgen [Akademischer Betreuer] Wunderlich. "Stratigraphy and properties of soil profiles along transects in Burkina Faso and Benin and their influence on phytodiversity / Cheikh Amadou Tidiane Anne. Gutachter: Jürgen Runge ; Jürgen Wunderlich. Betreuer: Jürgen Runge." Frankfurt am Main : Univ.-Bibliothek Frankfurt am Main, 2013. http://d-nb.info/1045005185/34.

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37

Chung, Sun-Ok. "On-the-go soil strength profile sensor /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p3137684.

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38

Habig, Johannes Hendrikus. "Soilborne disease suppressiveness / conduciveness : analysis of microbial community dynamics / by Johannes Hendrikus Habig." Thesis, North-West University, 2003. http://hdl.handle.net/10394/415.

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Take-all is the name given to the disease caused by a soilborne fungus Gaeumannomyces graminis (Sacc.) von Arx and Olivier var. tritici Walker (Ggt), an ascomycete of the family Magnaportheaceae (Cook, 2003). This fungus is an aggressive soil-borne pathogen causing root rot of wheat (primary host), barley and rye crops (secondary host). The flowering, seedling, and vegetative growth stages can be affected by the infection of the whole plant, leaves, roots, and stems. Infections of roots result in losses in crop yield and quality primarily due to a lowering in nutrient uptake. Take-all is most
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39

Monaghan, Áine Marie. "Investigations on the serotypes and virulence profiles of non-O157 Shiga-toxin producing Escherichia coli (STEC) and Enteropathogenic Escherichia coli (EPEC) isolated from bovine farms and abattoirs." Thesis, Ulster University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.695311.

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This study focuses on emerging E. coil serotypes and has developed methods for the isolation and identification of non-0157 STEC and EPEC. A basal medium for the isolation of these pathogens was developed as well as a serogroup specific PCR assay for the detection of the 02 serogroup. These culture and molecular based techniques have proven to be valuable in the detection, identification, and epidemiological investigation of these groups of emerging pathogens. These methods were applied to 1) a farm study, whereby samples (faecal and soil) and 2) an abattoir study, whereby samples (hide and ca
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40

Szilas, Casper. "The Tanzanian Minjingu phosphate rock : possibilities and limitations for direct application /." Copenhagen : Royal Veterinary and Agricultural University, Chemistry Department, 2002. http://www.kemi.kvl.dk/c̃asz/thesis_cszilas.pdf.

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41

Udukumburage, Rajitha Shehan. "Investigation of climatic-induced ground responses in expansive soils." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/198195/1/Rajitha%20Shehan_Udukumburage_Thesis.pdf.

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This thesis presents a practical approach for geotechnical practitioners to investigate the climatic-induced ground responses in expansive soils. The method is based on a novel long-term operable instrumented soil column (ISC). This research investigated the applicability of the current displacement models to the Australian context. As a result, the structural damages and maintenance costs due to cracking of light-weight structures founded on such soils can be minimised, and more importantly, the hazards to human lives can be prevented by improved decisions.
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42

Malvajerdi, Ahmad Sharifi. "Development of a soil compaction profile sensor." Thesis, Cranfield University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414666.

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43

Hamade, Firas Nadim. "Sediment removal from urban runoff using seep berms and vegetative filtration." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50271.

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Previous field demonstration projects in metro-Atlanta have shown that seep berms, which are elongated sedimentation basins at the outlet of a disturbed land area, can provide high suspended sediment trap efficiencies with respect to coarse sediments on construction sites having drainage areas greater than five acres. Previous literature has shown that vegetative filter strips are efficient traps for fine suspended sediment in stormwater runoff. A combination of a seep berm and vegetative filter in series was studied in this thesis as an erosion control measure with quantification of its flow
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44

Tifafi, Marwa. "Different soil study tools to better understand the dynamics of carbon in soils at different spatial scales, from a single soil profile to the global scale." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLV021/document.

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Les sols sont la principale composantede l’écosystème terrestre et le plus grand réservoir de carbone organique sur Terre, étant très réactifs aux perturbations humaines et aux changements climatiques. Malgré leur importance dans les réservoirs de carbone, la dynamique du carbone des sols est une source importante d'incertitudes pour les prévisions climatiques futures. Le but de la thèse était d'explorer différents aspects d’études du carbone des sols (mesures expérimentales, modélisation et évaluation de bases de données) à différentes échelles spatiales (de l'échelle d'un profil à l'échelle
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Tifafi, Marwa. "Different soil study tools to better understand the dynamics of carbon in soils at different spatial scales, from a single soil profile to the global scale." Electronic Thesis or Diss., Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLV021.

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Les sols sont la principale composantede l’écosystème terrestre et le plus grand réservoir de carbone organique sur Terre, étant très réactifs aux perturbations humaines et aux changements climatiques. Malgré leur importance dans les réservoirs de carbone, la dynamique du carbone des sols est une source importante d'incertitudes pour les prévisions climatiques futures. Le but de la thèse était d'explorer différents aspects d’études du carbone des sols (mesures expérimentales, modélisation et évaluation de bases de données) à différentes échelles spatiales (de l'échelle d'un profil à l'échelle
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46

Hancock, Steven J. "Geostatistics in soil profile interpretation for irrigated Riverland properties /." Title page, contents and abstract only, 1995. http://web4.library.adelaide.edu.au/theses/09SB/09sbh235.pdf.

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47

Naudžiūnaitė, Aistė. "Sunkiųjų metalų migracija skirtingų tipų dirvožemių profiliuoe." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090615_114718-15613.

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Darbo objektas – dviejų skirtingų dirvožemių profiliai. Darbo tikslas – ištirti sunkiųjų metalų migracijos ypatumus atskiruose dirvožemių profilių horizontuose. Darbo metodai - morfologinių dirvožemių profilių savybių tyrimas, dirvožemių profilių horizontų agrocheminių savybių (pH, organinės medžiagos kiekio, granuliometrinės sudėties) tyrimas pagal standartizuotas metodikas, sunkiųjų metalų (Zn, Cr, Pb, Cu) bendrųjų koncentracijų ir judriųjų jonų (CH3COONH4) profilių horizontų dirvožemiuose tyrimas atominės absorbcijos spektrometrijos metodu. Rezultatai – I dirvožemis buvo giliau glėjiškas p
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48

Sanchez, Pedro Andrade. "Design, development, and field evaluation of a soil compaction profile sensor /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.

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49

HAMED, LAMY MAMDOH MOHAMED. "NITROGEN BALANCE IN SOIL PROFILE AS AFFECTED BY DIFFERENT SOIL TYPE, SOIL WATER REGIMES, NITROGEN RATE AND APPLICATION METHODS USING 15N TRACER TECHNIQUE." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/232140.

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The interaction effect of “Soil type, Soil water regime, Nitrogen fertilizer application Rates and Timing” on Nitrogen balancein soil were studied; in terms of nitrogen gained by plant portions, remained in soil, and losses through different ways under wheat (Triticum aestivum L. Giza 168), in order to identify the most proper and effective combinations of above-studied variables that provides a satisfactory grain wheat yield and minimizes the use of chemical nitrogen fertilizers, to save the surrounding environment and to achieve good water saving. Two fields of experiments were carried out
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Gregorauskienė, Virgilija. "Cheminių elementų kiekių kaitos dėsningumai Lietuvos dirvožemio profilyje." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20121227_090556-03063.

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Disertaciniame darbe analizuojama Lietuvos dirvožemio cheminės sudėties vertikali kaita, paremta akredituotose laboratorijose nustatytais Lietuvos teritorijoje gautais duomenimis, analizuotais taikant standartizuotus matematinius–statistinius metodus. Tai leido objektyviai pagrįsti vertikalaus cheminių elementų pasiskirstymo dirvožemyje bendrus dėsningumus ir išryškinti Lietuvos dirvožemio vertikalios geocheminės sudėties specifiką tarptautiniame kontekste. Dirvožemio granuliometrinės sudėties ir išskirtų frakcijų cheminės sudėties analizė išryškino sąsajas tarp dirvožemio granuliometrinės ir
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