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Ivanyuk, Halyna. „Analysis of “Systematics of Polish Soils”“. Visnyk of the Lviv University. Series Geography, Nr. 44 (28.11.2013): 122–32. http://dx.doi.org/10.30970/vgg.2013.44.1210.
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The “Systematics of Polish Soils” (SgP, 2011) is very close to WRB and “Soil Taxonomy”. The morphological characteristics of the soils, investigated in the field, rather than soil genesis are diagnostic criteria. The main provisions of the new “Systematics”, properties of soils of higher taxonomic levels have been reviewed. Some diagnostic horizons, which were not borrowed from other classifications, have been described. We tried to find equivalents in the Ukrainian classification for some soils names. The correlation of Poland soils and WRB has been analyzed. Key words: Systematics of Polish Soils, classification, order, soil type, diagnostic horizon, WRB.
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Baldrian, P. „Microbial enzyme-catalyzed processes in soils and their analysis“. Plant, Soil and Environment 55, No. 9 (14.10.2009): 370–78. http://dx.doi.org/10.17221/134/2009-pse.
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Currently, measuring enzyme activities in soils or other lignocellulose-based materials is technically feasible; this measurement is particularly suitable for evaluating soil processes of biopolymer (cellulose, hemicelluloses, lignin, chitin and others) degradation by microbes and for assessing cycling and mobilization of principal nutrients including nitrogen, phosphorus and sulfur. With some considerations, assay methods can provide reliable information on the concentration of enzymes in soil or the rates of enzyme-catalyzed processes. Enzyme analyses in recent studies demonstrated a high level of spatial variability of soil enzyme activity both in depth and in space. The vertical gradients of enzyme activities are most developed in forest soils. Furthermore, enzyme activity in soils is regulated by seasonally-dependent variables such as temperature, moisture and the input of fresh litter. While several enzymes are widely produced by different groups of soil microorganisms, some of them can be used as indicators of the presence or activity of specific microbial taxa.
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Chakravarthy, Thokala, und K. Shyam Chamberlin. „Fly ash and bagasse ash embankment in flexible pavements for the analysis and strengthening of black cotton soil’s strength stabilized properties“. E3S Web of Conferences 391 (2023): 01005. http://dx.doi.org/10.1051/e3sconf/202339101005.
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Soil stabilization is necessary to increase the soil’s durability, volume stability, and engineering expansion strength. Expansive soils (also known as black cotton soil), a problem that affects the entire world and poses various challenges for civil engineers, are extremely hard while dry but completely lose their strength when wet. In this study, fly ash has been employed to stabilize the soil. Five, ten, twenty, and twenty-five percent of fly ash was used in the experiments. Bagasse ash is an easily accessible byproduct of the sugar cane refining process that has negative environmental effects. In this study, any potential pozzolanic benefits are evaluated while taking into account bagasse ash. material that stabilizes elongated soil In order to examine the soils’ geotechnical characteristics, the experimental investigation focuses on altering the fly ash content of the soils. The goal is to learn more about the characteristics of black cotton soil’s tensile strength. The primary goal of this research is to examine the effects of bagasse ash on the engineering expansive soil’s properties as revealed by various lab tests, and after improving the treated soil through embankment work at various civil engineering activities, such as roadways.
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Edmondson, Jill L., Zoe G. Davies, Sarah A. McCormack, Kevin J. Gaston und Jonathan R. Leake. „Are soils in urban ecosystems compacted? A citywide analysis“. Biology Letters 7, Nr. 5 (20.04.2011): 771–74. http://dx.doi.org/10.1098/rsbl.2011.0260.
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Soil compaction adversely influences most terrestrial ecosystem services on which humans depend. This global problem, affecting over 68 million ha of agricultural land alone, is a major driver of soil erosion, increases flood frequency and reduces groundwater recharge. Agricultural soil compaction has been intensively studied, but there are no systematic studies investigating the extent of compaction in urban ecosystems, despite the repercussions for ecosystem function. Urban areas are the fastest growing land-use type globally, and are often assumed to have highly compacted soils with compromised functionality. Here, we use bulk density (BD) measurements, taken to 14 cm depth at a citywide scale, to compare the extent of surface soil compaction between different urban greenspace classes and agricultural soils. Urban soils had a wider BD range than agricultural soils, but were significantly less compacted, with 12 per cent lower mean BD to 7 cm depth. Urban soil BD was lowest under trees and shrubs and highest under herbaceous vegetation (e.g. lawns). BD values were similar to many semi-natural habitats, particularly those underlying woody vegetation. These results establish that, across a typical UK city, urban soils were in better physical condition than agricultural soils and can contribute to ecosystem service provision.
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Rubio, Eduardo, María del Socorro Rubio-Alfaro und Martín Hernández-Marín. „Wetting Front Velocity Determination in Soil Infiltration Processes: An Experimental Sensitivity Analysis“. Agronomy 12, Nr. 5 (10.05.2022): 1155. http://dx.doi.org/10.3390/agronomy12051155.
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An experimental approach for measuring the wetting front velocity in soils during water infiltration processes is presented. This experimental research is developed to test the sensitivity of the measurement technique in the detection of differences in the dynamics of the wetting front advancement in different soil testing scenarios. Experimental scenarios include undisturbed and artificially compacted soils, square and circular cross-sections of soil samples, water flowing in both directions downward and horizontal, and water infiltration in a block soil sample. The measurement technique is based on wetting front detection employing moisture sensors that measure the soil’s electrical conductivity. The technique was able to detect differences in wetting front in contrasting scenarios. Two-dimensional wetting front advancement experiments carried out on a block sample confirmed the results obtained for the one-dimensional case.
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Švec, O., L. Bílek, J. Remeš und Z. Vacek. „Analysis of operational approach during forest transformation in Klokočná Range, Central Bohemia“. Journal of Forest Science 61, No. 4 (03.06.2016): 148–55. http://dx.doi.org/10.17221/102/2014-jfs.
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Afforestation of agricultural lands may be in many cases a positive step. Especially, it is a beneficial with waterlogged soils, stony soils or for soils which are for any other reason less fertile and unsuitable for farming. Even too in the agricultural landscape, afforestation can be very important by the breaking of large farm blocks by windbreakers and bio-corridors. The value, quality and fertility of soil can be assessed in different ways. The aim of this study is to determine the criteria for the identification of agricultural land suitable for afforestation. This evaluation process is based on Evaluated Soil Ecological Units (BPEJ) that are publicly available and already processed for all agricultural land. The results are represented by complete list of Evaluated Soil Ecological Units that are suitable for afforestation with stating the reason why they were chosen.
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Kaminski, P., M. Urlaub, J. Grabe und C. Berndt. „Geomechanical behaviour of gassy soils and implications for submarine slope stability: a literature analysis“. Geological Society, London, Special Publications 500, Nr. 1 (19.12.2019): 277–88. http://dx.doi.org/10.1144/sp500-2019-149.
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AbstractSubmarine slope failures pose a direct threat to seafloor installations and coastal communities. Here, we evaluate the influence of free gas on the soil's shear strength and submarine slope failures in areas with gassy soils based on an extensive literature review. We identify two potential destabilization mechanisms: gas bubbles in the pore space lead to a reduced shear strength of the soil and/or gas induces excess pore pressures that consequently reduce the effective stress in the soil. Our evaluation of the reported mechanical and hydraulic behaviour of gassy sediments indicates that the unfavourable impact of entrapped gas on a soil's shearing resistance is not sufficient to trigger large-scale slope failures. Liquefaction failure due to high gas pressures is, however, a viable scenario in coarse-grained soils. Transferring the gas influence on the soil mechanical behaviour to constitutive models is identified as the most important prerequisite for a successful future analysis of slope stability.
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Šarapatka, B., M. Bednář und P. Novák. „Analysis of soil degradation in the Czech Republic: GIS approach“. Soil and Water Research 5, No. 3 (16.09.2010): 108–12. http://dx.doi.org/10.17221/487-swr.
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In our work, we have evaluated the available data on the individual types of soil damage, which has been processed in the Czech Republic in recent decades. The individual types of degradation (water erosion, wind erosion, soil compaction, extreme soils (clay soils), loss of organic matter, acidification, dryness impact, and intoxication) were classified in one of three groups: physical degradation, desertification and chemical degradation. Each type of degradation was assigned a specific weight reflecting the importance of this kind of soil degradation. The maps of individual areas of degradation were processed by overlay and assigning weighting techniques in ArcView Spatial Analyst GIS environment to create the final maps for each class of the degradation threat. The same technique was used to create the final map showing the most troubled areas in the Czech Republic, threatened by soil damage.
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Widden, Paul. „Microfungal community structure from forest soils in southern Quebec, using discriminant function and factor analysis“. Canadian Journal of Botany 64, Nr. 7 (01.07.1986): 1402–12. http://dx.doi.org/10.1139/b86-192.
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Fungal isolation data, from four forest soils, were analyzed using both discriminant analysis and factor analysis, to investigate the structure of fungal communities. The analyses indicated that the forest of origin was a major factor determining fungal community structure in these soils. Discriminant analysis separated the fungal communities of coniferous-forest soil samples from those of deciduous-forest soil samples. The pine-forest soil, which was in an early stage of invasion by hardwoods, had a fungal community intermediate in structure between the extremes. Of the microfungi isolated, Botryotrichum piluliferum, Farrowia seminuda, Geomyces pannorus, Mucor hiemalis, Penicillium janthinellum, Trichoderma polysporum, and Zygorrhynchus moelleri were associated with the coniferous sites, whereas an Acremonium species, Gliomastix murorum, Paecilomyces carneus, Pae. fumosoroseus, Penicillium spinulosum, and Pen. thomii characterized the deciduous-forest soils. Many pine-forest soil fungi were species abundant in the other soils, a possible reflection of the successional stage of the forest. Both factor analysis and discriminant analysis yielded similar interpretations of the data and indicated the importance of fungal interactions in determining community structure. The discriminant analyses also showed that fungal isolation data gave a better separation between the soils of the four forests than did abiotic data.
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Miltenyi, Gregory P. L., Malte C. Ebach und John Triantafilis. „Assessing the Australian Soil Classification using cladistic analysis“. Soil Research 53, Nr. 7 (2015): 772. http://dx.doi.org/10.1071/sr14323.
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The Australian Soil Classification (ASC) has its roots in both the Handbook of Australian Soils and the Factual Key. The scheme’s use of mutually exclusive characteristics has led to Soil Orders containing a diverse range of soils, such as the Dermosols. The extent of these groupings has resulted in classes of soils sharing greater relationships with soils from other classes than they do with soils in the same class. Situations such as this arise from artificial classifications and highlight the need for natural classifications. Natural classifications accurately represent what is occurring in nature and are desirable because they represent evidence of a common history, process or mechanism. This study uses cladistics, a robust biological method that uncovers natural classifications, to assess the naturalness of the ASC. The analysis has the secondary aims of identifying natural soil orders and establishing which characters and tiers require revision. Two measures commonly used in cladistics, consistency index (CI) and retention index (RI), are used along with confidence levels generated by bootstrapping. The cladistic analysis undertaken consisted of coding 113 morphological and non-morphological characters used to identify 13 of the 14 Soil Orders in ASC into binary and multi-state matrices and analysis using a parsimony cladistic algorithm. The results suggest that, because of its low CI (0.196), the ASC is not a natural classification. However, certain Soil Orders of Organosols, Podosls and Vertosols, which all registered high CI, are natural. The analysis also indicated which soil morphological characters and Soil Orders require revision in order to make the ASC more natural, namely, soil colour and characters located in the Great Groups as well as Soil Orders such as Chromosols, Ferrosols and Dermosols. We conclude that cladistics offers a new avenue in discerning relationships between soils and in assessing the accuracy of, and identifying where improvements can be made in, the classifications used to identify them.
Song, Chi-Yong. „Numerical formulation for a dynamic analysis of the plastic behavior in saturated granular soils“. Columbus, Ohio Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1070309764.
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Thesis (Ph. D.)--Ohio State University, 2003. Title from first page of PDF file. Document formatted into pages; contains xix, 246 p.; also includes graphics. Includes abstract and vita. Advisor: William E. Wolfe, Dept. of Civil Engineering. Includes bibliographical references (p. 137-142).
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Kim, Hak Jin. „Ion-selective electrodes for simultaneous real-time analysis for soil macronutrients“. Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4471.
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Thesis (Ph.D.)--University of Missouri-Columbia, 2006. 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 (April 26, 2007) Vita. Includes bibliographical references.
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Schaefer, Vernon Ray. „Analysis of reinforced embankments and foundations overlying soft soils“. Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/49886.
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The use of tensile reinforcement to increase the tensile strength and shear strength of soils has lead to many new applications of reinforced soil. The use of such reinforcing in embankments and foundations over weak soils is one of the most recent applications of this technology. The studies conducted were concerned with the development of and application of analytical techniques to reinforced soil foundations and embankments over weak soils.
A finite element computer program was modified for application to reinforced soil structures, including consolidation behavior of the foundation soil. Plane strain and axisymmetric versions of the program were developed and a membrane element developed which has radial stiffness but no flexural stiffness. The applicability of the program was verified by comparing analytical results to case histories of reinforced embankments and to model studies of reinforced foundations.
A simplified procedure for computing the bearing capacity of reinforced sand over weak clay was developed which is more general than those previously available. Good agreement with available experimental results was obtained, providing preliminary verification of the procedure.
Extensive analyses were made of a reinforced embankment successfully constructed with no sign of distress, and of two reinforced embankments constructed to failure. These analyses showed that good agreement can be obtained between measured and calculated reinforcement forces, settlements, and pore pressures for both working and failure conditions. The analyses further show that the use of the finite element method and limit equilibrium analyses provide an effective approach for the design of reinforced embankments on weak foundations. Ph. D. incomplete_metadata
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Silver, Richard. „Unsaturated Flow Analysis of Heap Leach Soils“. Thesis, Boston College, 2013. http://hdl.handle.net/2345/3055.
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Thesis advisor: Alan Kafka Heap leach flow patterns are governed by hydrogeological parameters including, soil properties, saturated and unsaturated hydraulic conductivity, initial degree of saturation, and the method of irrigation. Optimizing production during leaching cycles requires knowledge of the hydrogeological parameters of the leach heap, and their effect on flow behavior. This thesis research involved quantifying the flow rates of unsaturated homogenous soil profiles. Finite element numerical modeling has been utilized to simulate 1-dimensional unsaturated transient vertical flow. A series of parametric studies were conducted to examine how various soil properties and differing initial and boundary conditions affect percolation and flow. Results indicate that flow and percolation are increased or impeded based on the saturated and unsaturated parameters of the soil profile. Sensitivity analysis illustrates that the initial degree of saturation affects hydraulic behaviour relative to soil hydraulic conductivity, matric potential (negative pressure head), and the method of irrigation. At the initial stage of the research, some analyses indicated that numerical instabilities may occur within simulations due to selected mesh density, initial time step length, error tolerance, and the selected form of the unsaturated Richards Equation Thesis (MS) — Boston College, 2013 Submitted to: Boston College. Graduate School of Arts and Sciences Discipline: Earth and Environmental Sciences
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Tsiampousi, Aikaterini. „Numerical analysis of slopes in unsaturated soils“. Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/6885.
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Conventional constitutive models developed for saturated soils are inadequate when analysing problems involving unsaturated conditions. Although unsaturated constitutive models are available in the Imperial College Finite Element Program (ICFEP), there are aspects of unsaturated soil response that are not adequately simulated. The aim of the present thesis is to develop and implement numerical expressions describing the most relevant of these features and to apply them in combination with the existing ICFEP capabilities to boundary value problems involving unsaturated soils. The over-prediction of the peak shear stress exhibited by overconsolidated soils and the simplicity of the soil-water retention relationship employed, constitute the focal points of the improvements suggested. A new surface is introduced to substitute for the yield and plastic potential functions on the dry side of critical state, in order to prevent the available constitutive models from overestimating the peak deviatoric stress. The development, implementation and calibration of this surface are presented, followed by analyses of laboratory experiments demonstrating the improved simulation of soil behaviour. Novel formulations are proposed for the soil-water retention curve, which defines the relationship between the degree of saturation or the water content and the applied suction, modelling its hysteretic nature and incorporating the effect of specific volume. Ultimately, a three-dimensional hysteretic surface, defined in terms of degree of saturation, suction and specific volume, is presented. The new developments are subsequently applied to the numerical analysis of boundary value problems involving (a) the stability of slopes in overconsolidated unsaturated soils and (b) the behaviour of unsaturated soil slopes under seasonal changes of suction, highlighting the importance of adopting appropriate constitutive models.
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Larsen, Zachary S. „Thin Soils and Sacbes: The Soil Resources of Uci, Yucatan, Mexico“. BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3505.
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The objective of this study was to use pedological evidence in conjunction with Geographic Information Systems, and soil physical and chemical analyses as means to better understand the agricultural landscape surrounding the ancient Maya city of Uci. Specifically, the query of this thesis is to determine whether there is an association between settlement density and soil resources, and what relationship if any there is between the ancient sacbe of Uci and its surrounding agricultural potential. Stable carbon isotope analysis of the humin fraction of the soil organic matter was conducted on several profiles from karst depressions known as rejolladas near the site center, and from a select number of sufficiently deep profiles along and surrounding the ancient sacbe, and from beneath ancient structures. A strong C isotopic signature of ancient C4 crops was found in a limited number of profiles while a majority of the profiles showed no evidence, or little to inconclusive evidence due to a mixture of C3 and C4 plants in the natural landscape. A majority of the soils surrounding Uci are shallow to extremely shallow and many profiles sampled and studied did not allow for C isotopic analysis. Isotopic evidence along with other soil chemical and physical characteristics suggests that settlement density was linked to soil resources, specifically in the case of the rejolladas proximity to the Uci site center. However, it does not appear that the construction and location of the sacbe was linked to its surrounding soil resources or agricultural potential even though ancient maize crops may have been cultivated sporadically close to the sacbe and nearby structures. The soil resources of Uci are not conducive to the production of large maize crops and the ancient Maya of this area likely utilized maize along with alternative crops, arboriculture, wild game and trade to sustain its population.
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Pelletier, Bernard 1964. „A multivariate analysis of tree species influence on forest floor fertility /“. Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=68239.
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The objective of this study was to assess tree species influence on forest floor fertility in a mixed forest stand using Redundancy Analysis (RDA). Eighty microsites were located in a beech-hemlock-red maple forest. Forest floor was analyzed for thirteen variables; total N, P, K, Ca and Mg, extractable Ca, Mg and K, mineralizable N (NH$ sb{4+}$), basal microbial respiration (CO$ sb2$), pH, thickness and bulk density. The influence of seven tree species was calculated as a function of tree diameter and distance from each microsite. Spatial patterns were detected by using correlograms and incorporated in a variation-partitioning model with trend surface analysis. Tree species, microtopography, and spatial structure explained 53% of the total variation in forest floor data. The fraction explained by tree species alone (16%) was studied with a RDA ordination biplot. The main source of variation in the soil data was related mainly to the opposite effects of American beech and eastern hemlock on calcium while most of the other species had a beneficial effect on soil fertility. This study showed the potential of RDA as a tool for studying the role of tree species in mixed forests.
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Golchin, Ahmad. „Spatial distribution, chemistry and turnover of organic matter in soils“. Title page, contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phg617.pdf.
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Copies of author's previously published works inserted. Bibliography: leaves 260-299. This thesis describes the concept of organic matter turnover and various methods to measure the decay rates of organic materials in the soil. Methods are developed to separate SOM from different locations within the soil matrix. Free particulate organic matter (POM), located between or outside the soil aggregates is isolated. Occluded POM is disaggregeted by sonification. The compositional differences noted among the three components of SOM are used to describe the changes that OM undergoes during decomposition. The process is followed as organic matter enters the soil, is enveloped in aggregates and is eventually incorporated into the microbial biomass and metabolites then becoming associated with clay minerals.
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Romero, Salome M. „Ground motion amplification of soils in the upper Mississippi Embayment“. Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/32841.
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Nolin, Anne Walden 1958. „CLASSIFICATION AND MAPPING OF SOILS USING A MULTISPECTRAL VIDEO SYSTEM AND COMPUTER-AIDED ANALYSIS“. Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/276549.
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An airborne multispectral video system was used to collect soil spectral data over a four-square mile region in northeastern Arizona. Six multispectral video images were digitized. Using the red and blue bands of each image, an unsupervised classification was performed. Each was referenced to a digitized U.S. Soil Conservation Service map resulting in classification precisions ranging from 0-92.4 percent. Ground radiometric measurements were made to ascertain spectral separability of the soil samples. Soil color was determined to try to relate Munsell value to classification precision. Misclassification of soil map units was unrelated to soil brightness or areal extent of each soil. Rather, features such as slope, boundary complexity, and surface condition was responsible for misclassifications seen in this study. Best classification results occurred when soil mapping units were relatively homogeneous, possessed slight changes in slope, and had a regular surface with smooth and distinct boundaries.
Sparks, Donald L., Ph. D., Soil Science Society of America. und American Society of Agronomy, Hrsg. Methods of soil analysis. Madison, Wis: Soil Science Society of America, 1996.
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1958-, Bloem Jaap, Hopkins David W. Dr und Benedetti Anna Dr, Hrsg. Microbiological methods for assessing soil quality. Cambridge, MA: CABI Pub., 2005.
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Arnold, Klute, Campbell G. S und Soil Science Society of America., Hrsg. Methods of soil analysis. 2. Aufl. Madison, Wis: Soil Science Society of America, 1986.
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H, Dane J., Topp G. Clarke, Campbell Gaylon S und Soil Science Society of America., Hrsg. Methods of soil analysis. Madison, Wis: Soil Science Society of America, 2002.
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1931-, Brown J. R., und Soil Science Society of America. Division S-4., Hrsg. Soil testing: Sampling, correlation, calibration, and interpretation : proceedings of a symposium. Madison, Wis., USA: Soil Science Society of America, 1987.
Rate, Andrew W. „Spatial Variability and Data Analysis in Urban Soils“. In Urban Soils, 53–88. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-87316-5_3.
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Erickson, Andrew J., Peter T. Weiss und John S. Gulliver. „Analysis of Water and Soils“. In Optimizing Stormwater Treatment Practices, 193–214. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-4624-8_11.
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Brancier, Jeanne, Amandine Courte, Dominique Todisco und Michel Brossard. „Physicochemical Analysis of Neotropical Soils“. In Methods in Historical Ecology, 34–45. Abingdon, Oxon ; New York, NY : Routledge, 2021.: Routledge, 2020. http://dx.doi.org/10.4324/9780429060175-6.
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Malley, D. F., P. D. Martin und E. Ben-Dor. „Application in Analysis of Soils“. In Near-Infrared Spectroscopy in Agriculture, 729–84. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2015. http://dx.doi.org/10.2134/agronmonogr44.c26.
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Arlinghaus, Sandra Lach, William C. Arlinghaus, William D. Drake und John D. Nystuen. „Soils and Forestry Data Analysis“. In Practical Handbook of Curve Fitting, 127–46. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003418221-6.
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Sway, T. Swe A. T., und S. Bang. „Analysis of geofiber reinforced soils“. In New Horizons in Earth Reinforcement, 357–62. London: CRC Press, 2023. http://dx.doi.org/10.1201/9781003416753-54.
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Duncan, Chester I. „Settlement Analysis“. In Soils and Foundations for Architects and Engineers, 106–28. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5417-2_6.
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Ure, A. M. „Methods of analysis for heavy metals in soils“. In Heavy Metals in Soils, 58–102. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1344-1_4.
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Du Laing, Gijs. „Analysis and Fractionation of Trace Elements in Soils“. In Trace Elements in Soils, 53–80. Chichester, UK: John Wiley & Sons, Ltd, 2010. http://dx.doi.org/10.1002/9781444319477.ch4.
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Konferenzberichte zum Thema "Soils Analysis":
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Young, Michael H., William A. Albright, Karl F. Pohlmann, Greg M. Pohll, Walter H. Zachritz, Stephen Zitzer, David S. Shafer, Irene Nester und Layi Oyelowo. „Designing Alternative Landfill Covers Using Parametric Uncertainty Analysis“. In Fourth International Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)53.
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McCartney, John S., und Jorge G. Zornberg. „Decision Analysis for Design of Evapotranspirative Landfill Covers“. In Fourth International Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)54.
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Hong, Dae-Seok, Jong-Sik Shon, Tae-Kuk Kim und Han-Seok Cho. „Development of the Analysis Method for the Radioactivity Concentration Estimation of Soils for a Regulatory Clearance“. In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89443.
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In this study, for the analysis of a radioactivity concentration of soil, a sampling and an analyzing method were developed. To create homogeneity of the contents for each drum, big particles such as pebbles, rocks and scraps of concrete were removed after pouring the soil into a tray. And then the soil in the tray was mixed thoroughly. A 10 × 10 grid was used to partition the soil into 100 sections. 2 liter of soil was sampled out of 30 randomly pre-selected sections. Only 1 liter of the soil out of 2 liters was used for the γ-spectrometry analysis. The remaining 1 liter of soil was stored for a validation purpose. For a verification of the sampling process, 3 samples were taken from each drum and analyzed. 5 drums were used for the verification. And the results show that this sampling method has about a 9% sampling error. Also, the analysis results of the 865 drums of soil showed that the major nuclides in the soils were Co-60 and Cs-137 while a small amount of Mn-54, Fe-59, I-131, Cs-134 and Eu-152 were detected as γ-emitters. About 73% of the soils had a total radioactivity concentration below 0.1 Bq/g, while the soils with more than 0.4 Bq/g of a radioactivity concentration were only 3%. Based on the guide for the regulatory clearance criteria recommended by the IAEA (International Atomic Energy Agency), about 73% of the soils can be regulatory cleared without any treatment. Also, the remaining soils can be regulatory cleared after a further storage. Only 3% of the soils are considered to be necessary for a decontamination treatment. The results of this study can be applied to the treatment of radioactive soils generated in a large amount during the decommissioning of a nuclear facility.
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Heydinger, Andrew G., und B. O. A. Davies. „Analysis of Variations of Pavement Subgrade Soil Water Content“. In Fourth International Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)15.
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Habte, Michael A., und Nasser Khalili. „A Constitutive Model for Cyclic Analysis of Unsaturated Soils“. In Fourth International Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)162.
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Murray, E. J., und J. Brown. „Assumptions in Equilibrium Analysis and Experimentation in Unsaturated Soil“. In Fourth International Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)204.
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Fuselier, Tulin, Lewis Edgers und Farrokh Nadim. „Transient Flow in Unsaturated Soils: Numerical Analysis and Case Study“. In Fourth International Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)173.
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Velosa, C. L., und J. E. Colmenares. „Analysis of the Volume Change Behavior of Expansive Compacted Soils“. In Fourth International Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)73.
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Oka, F., T. Kodaka, S. Kimoto, Y. S. Kim und N. Yamasaki. „An Elasto-Viscoplastic Model and Multiphase Coupled FE Analysis for Unsaturated Soil“. In Fourth International Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)172.
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Sreelakshmi, G., M. N. Asha und Divya Viswanath. „Investigations on Pile-Soil Interaction Using Image Analysis“. In Second Pan-American Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481684.047.
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Berichte der Organisationen zum Thema "Soils Analysis":
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Drumm, E. C. Soil mechanics and analysis of soils overlying cavitose bedrock. Office of Scientific and Technical Information (OSTI), August 1987. http://dx.doi.org/10.2172/5998770.
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Berney IV, Ernest S., und Ronald E. Wahl. A Rapid Soils Analysis Kit. Fort Belvoir, VA: Defense Technical Information Center, März 2008. http://dx.doi.org/10.21236/ada483829.
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Buck, E. C., N. L. Dietz, J. K. Bates und J. C. Cunnane. Uranium-contaminated soils: Ultramicrotomy and electron beam analysis. Office of Scientific and Technical Information (OSTI), Februar 1994. http://dx.doi.org/10.2172/10106831.
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Buck, E. C., N. L. Dietz, J. K. Bates und J. C. Cunnane. Uranium-contaminated soils: Ultramicrotomy and electron beam analysis. Office of Scientific and Technical Information (OSTI), April 1994. http://dx.doi.org/10.2172/10141746.
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Berney, Ernest, Naveen Ganesh und David Daily. Revised Rapid Soils Analysis Kit (RSAK) – wet methodology. Engineer Research and Development Center (U.S.), Februar 2018. http://dx.doi.org/10.21079/11681/26411.
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Liu und Nixon. L52305 Probabilistic Analysis of Pipeline Uplift Resistance. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), Juni 2010. http://dx.doi.org/10.55274/r0000002.
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Annotation:
To investigate the feasibility of probabilistic analyses of the peak uplift resistance in frozen soils by varying parameters that are known to be important for the development of the uplift resistance under the upward movement of a pipe. A buried pipeline will be subjected to a variety of forces, both internal and external, including the interaction of the pipe with the surrounding soil. The soil-pipe interaction in permafrost regions have to account for the behavior of frozen and unfrozen soil, and transitions between the two as the pipeline traverses in a discontinuous permafrost zone. The variations in the properties and behavior of frozen soils are expected to be substantial in three dimensions of the Right-of-Way (ROW) and with time (seasonal fluctuations and changes with the history of pipeline operation). Given the uncertainties with frozen soil properties and the changes in behavior with time and location, a large variation in soil-pipe interaction characteristics can exist. The uplift resistance of a pipeline is one of these soil-pipe interactions that can be impacted by a variation in soil condition and state. A need was identified to outline the use of a probabilistic analysis of pipe uplift resistance in an attempt to capture the magnitude of these variations and uncertainties of frozen soil and the impact on the soil-pipe interaction. The probabilistic analysis allows the designer of a pipeline to consider a range of uplift resistance to a certain confidence level that would represent the likely values that a pipe may be subjected to. The work presented in this report is more focused on the methodology of the probabilistic approach, rather than the analysis itself for a specific design case, even though an example is provided for illustration purposes. A series of numerical simulations using Fast Lagrangian Analysis of Continua (FLAC) were completed varying one parameter with each run to develop a library of peak uplift resistances for a variety of different temperatures, soil properties and pipe parameters. The FLAC model was previously developed for PRC, a summary of this report is provided here to outline important parameters that were used to complete this analysis. The simulations were used to develop a correlation of peak uplift resistance as a function of soil tensile strain limit, modulus of deformation, and creep of frozen soils. Each of these parameters is dependent of the pipeline conditions such as temperature, displacement rate, and effective frozen cover depth. It is noted that the scope of the work was to develop a probabilistic method of estimating peak uplift resistance in frozen soils. Even though some sensitivity analysis were carried out, as outlined later in this report, to assess the impacts of the variable, detailed uncertainty analysis or risk assessment were not performed.
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Shivakumar, Pranavkumar, Kanika Gupta, Antonio Bobet, Boonam Shin und Peter J. Becker. Estimating Strength from Stiffness for Chemically Treated Soils. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317383.
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Annotation:
The central theme of this study is to identify strength-stiffness correlations for chemically treated subgrade soils in Indiana. This was done by conducting Unconfined Compression (UC) Tests and Resilient Modulus Tests for soils collected at three different sites—US-31, SR-37, and I-65. At each site, soil samples were obtained from 11 locations at 30 ft spacing. The soils were treated in the laboratory with cement, using the same proportions used for construction, and cured for 7 and 28 days before testing. Results from the UC tests were compared with the resilient modulus results that were available. No direct correlation was found between resilient modulus and UCS parameters for the soils investigated in this study. A brief statistical analysis of the results was conducted, and a simple linear regression model involving the soil characteristics (plasticity index, optimum moisture content and maximum dry density) along with UCS and resilient modulus parameters was proposed.
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Beal, Samuel, Ashley Mossell und Jay Clausen. Matrix and target particle-size effects on LIBS analysis of soils. Engineer Research and Development Center (U.S.), Januar 2020. http://dx.doi.org/10.21079/11681/35374.
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Girard, I., und R. A. Klassen. A comparison of seven methods for analysis of carbon in soils. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2001. http://dx.doi.org/10.4095/212695.
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Sims, W. R., B. B. Looney und C. A. Eddy. Evaluation of a rapid headspace analysis method for analysis of volatile constituents in soils and sediments. Office of Scientific and Technical Information (OSTI), Dezember 1991. http://dx.doi.org/10.2172/10129295.
