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Dissertations / Theses on the topic 'Soil horizons'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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1

Pereira, Osvaldo José Ribeiro. "Mapping soil organic carbon storage in deep soil horizons of Amazonian Podzols." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/64/64135/tde-14062016-113621/.

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The Podzols of the world are divided into intra-zonal and zonal according to then location. Zonal Podzols are typical for boreal and taiga zone associated to climate conditions. Intra-zonal podzols are not necessarily limited by climate and are typical for mineral poor substrates. The Intra-zonal Podzols of the Brazilian Amazon cover important surfaces of the upper Amazon basin. Their formation is attributed to perched groundwater associated to organic matter and metals accumulations in reducing/acidic environments. Podzols have a great capacity of storing important amounts of soil organic car
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2

Simonsson, Magnus. "Mechanisms controlling the solubility of aluminium in B horizons of podzolized soils /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5711-4.pdf.

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3

Kothawala, Dolly N. "Controls on the soil solution partitioning of dissolved organic carbon and nitrogen in the mineral horizons of forested soils." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115565.

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Note:<br>The soil-solution partitioning of dissolved organic carbon (DOC) withinmineral soil horizons is primarily controlled by processes of adsorption and desorption. These abiotic processes largely occur within a short equilibration time of seconds to minutes, which generally occur faster than microbial processes. To characterise the adsorption of DOC to mineral soils, I used the Langmuir adsorption isotherm, which holds several advantages to the commonly used linear initial mass (IM) isotherm. One advantage to using the Langmuir isotherm is anestimation of the maximum DOC adsorption capaci
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4

Kothawala, Dolly N. 1972. "Controls on the soil solution partitioning of dissolved organic carbon and nitrogen in the mineral horizons of forested soils." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115858.

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The soil-solution partitioning of dissolved organic carbon (DOC) within mineral soil horizons is primarily controlled by processes of adsorption and desorption. These abiotic processes largely occur within a short equilibration time of seconds to minutes, which generally occur faster than microbial processes. To characterise the adsorption of DOC to mineral soils, I used the Langmuir adsorption isotherm, which holds several advantages to the commonly used linear initial mass (IM) isotherm. One advantage to using the Langmuir isotherm is an estimation of the maximum DOC adsorption capacity (Qma
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5

Wardinski, Katherine Mary. "Dissolved Organic Matter Sources from Soil Horizons with Varying Hydrology and Distance from Wetland Edge." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/104933.

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Understanding hydrologic controls on carbon accumulation and export within geographically isolated wetlands (GIW) has implications for the success of wetland restoration efforts intended to produce carbon sinks. However, little is known about how hydrologic connectivity along the aquatic-terrestrial interface in GIW catchments influences carbon dynamics, particularly regarding dissolved organic matter (DOM) transport and transformation. The organic matter (carbon) that accumulates in wetland soils may be released into water, generating DOM. DOM is mobile and reactive, making it influential to
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6

Blaud, Aimeric. "Responses of microbial communities to atmospheric nitrogen deposition within different soil horizons in High Arctic tundra." Thesis, University of Sheffield, 2012. http://etheses.whiterose.ac.uk/2759/.

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Arctic environments are subject to acute nitrogen deposition events, in which 40% or more of annual atmospheric N input can be deposited as acidic rainfall in less than one week. The overall aim of this research was to investigate the impact of acute N deposition events upon soil microbial communities in High Arctic tundra. A plot scale field experiment, established on the High Arctic tundra (Ny-Ålesund, Svalbard), and a microcosm experiment, were used to simulate acute N deposition over the summer by the application of NH4NO3 solution at ~pH 4, at rates of 0.4, 4 and 12 kg N ha-1 yr-1. Chang
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7

Thomsen, Frida. "A laboratory study on the immobilisation of inorganic chlorine in soil." Thesis, Linköping University, The Tema Institute, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7164.

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<p>Inorganic chlorine (Clinorg) is generally considered to be inert and has been used as a tracer for groundwater movements. This assumption is thereby fundamental for current knowledge about soil biogeochemistry. However, recent work showed that Clinorg can be retained, i.e. immobilised, in soil, which contradicts the previous assumptions. The aim of this laboratory study was to investigate if the processes that immobilise Clinorg in soil are affected by molecular oxygen (O2), and if the immobilisation occurs in the top soil layer only or also further down were the soil structure is different
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8

Weiglein, Tyler Lorenz. "A Continental-Scale Investigation of Factors Controlling the Vulnerability of Soil Organic Matter in Mineral Horizons to Decomposition." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/101987.

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Soil organic matter (SOM) is the largest terrestrial pool of organic carbon (C), and potential carbon-climate feedbacks involving SOM decomposition could exacerbate anthropogenic climate change. Despite the importance of SOM in the global C cycle, our understanding of the controls on SOM stabilization and decomposition is still developing, and as such, SOM dynamics are a source of major uncertainty in current Earth system models (ESMs), which reduces the effectiveness of these models in predicting the efficacy of climate change mitigation strategies. To improve our understanding of controls on
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9

Holland, Anne E. "Organic lamellae in the eluvial horizons of podzols : a field study of the distribution of a morphological feature in the soil landscape." Thesis, University of Reading, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329721.

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10

Lopes, Josiane Millani. "Caracterização e evolução das substâncias húmicas de horizontes espódicos na planície costeira do estado de São Paulo." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-10022011-100856/.

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A evolução da planície costeira do Estado de São Paulo foi influenciada por eventos de transgressões e regressões do mar durante o Quaternário e suas características resultam da interação da dinâmica dos processos geológicogeomorfológicos que agiram continuamente durante esses eventos. Os solos de maior ocorrência nesse ambiente, genericamente chamado de restinga, são os Espodossolos, caracterizados pela presença de horizonte espódico (Bh ou Bhm). São poucos os estudos científicos relacionadas à gênese destes solos em regiões tropicais, assim como há poucos estudos detalhados avaliando as cara
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11

Paveley, C. F. "Heavy metal sources and distribution in soils, with special reference to Wales : Background ranges, threshold concentrations and sources of lead, zinc, copper, cadmium, cobalt, nickel, manganese and iron in A and B soil horizons." Thesis, University of Bradford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233744.

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12

Farias, Ismar Lima de. "Comportamento mecânico e hídrico de um argissolo amarelo de tabuleiros costeiros cultivado com cana-de-açúcar." Universidade Federal de Sergipe, 2012. https://ri.ufs.br/handle/riufs/6647.

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The Coastal Tableland ecosystem is of great importance for the Brazilian Northeast region being mainly cultivated with the sugar cane crop. This ecosystem has soils with cohesive layer of geogenic origin presenting a dense layer that can became denser by an intensive use of agricultural machines and implements under insufficient soil moisture. The development and deepening of roots are restricted by this dense layer that reduce the water infiltration and availability in the soil profile, that associated to dry season periods has as a result the decrease of crops productivity and longevity. The
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13

Gomes, Carolyn. "Spatial distribution of B horizon properties in a pine flatwood landscape New Hanover County, NC /." View electronic thesis, 2008. http://dl.uncw.edu/etd/2008-3/gomesc/carolyngomes.pdf.

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14

Chadwick, Katherine L. "The response of dissolved carbon dynamics to environmental change in upland shallow organic soils : a study of organic horizon responsiveness and soil horizon interactions." Thesis, University of Aberdeen, 2007. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU238550.

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This thesis examined the relatively uncharted realm of dissolved C dynamics in upland shallow organic soils. Extensive preliminary investigations and preparatory experimental evaluations led to the successful deployment of sampling strategies at a range of spatial scales in a climosequence of matched field sites in Wales, Scotland and Iceland. These sites provided the basis for investigation of climatic and mineralogical effects upon dissolved C transformations in upland shallow organic soils. Biological assessments including novel application of modified techniques identified the responsivene
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15

Al-Taher, Hossam. "Factors Affecting Mobility of Copper in Soil-Water Matrices." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/26132.

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Copper is applied to many crops as a fungicide/bactericide, including plasticulture tomato growing operations. Field tests have shown that copper is sometimes found in ground water near these fields. Therefore, a laboratory study was undertaken to determine if this copper can result from plasticulture application and to determine the mechanisms that account for the movement through soil to the subsurface. From the factors that may affect this mobility process; TOC, dryness and its temperature cycle and water content of the soil were selected for study. These factors were investigated in both b
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16

Silva, Eduardo Vinicius da. "Contribuição dos horizontes profundos do solo para o fornecimento de nutrientes em plantações de eucalipto." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-13092011-093505/.

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No Brasil, a alta produtividade das plantações florestais tem despertado grande interesse em relação à nutrição das árvores. Diante disso, este trabalho tratou de 2 estudos sobre a absorção de nutrientes pelas árvores de Eucalyptus grandis. O primeiro avaliou o potencial de absorção de N, K e Ca pelas árvores de E. grandis (6 anos de idade - 25 m de altura média) em função da profundidade, da textura e da umidade do solo. Através de tubos de plástico, aplicou-se conjuntamente os marcadores NO3 --15N, Rb+ (análogo ao K+) e Sr2+ (análogo ao Ca2+) nas profundidades de 10, 50, 150 e 300 cm, num La
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17

Arslan, Awadis. "Modeling water quality for soils containing gypsic horizons." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185231.

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A computer simulation model was developed to simulate the impact of irrigating soils containing gypsic horizons on soil water quality and percolated water quality. The model simulates saturated - unsaturated solute movement using the mixing cell approach to simulate dispersion and movement of soluble salts. Dissolution and precipitation of slightly soluble salts and the formation of ion pairs is considered as a function of temperature. Van Genuchten closed form equation is used to find soil water retention function. Finite difference method was applied to Richards equation for moisture movemen
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18

Lunardi, Neto Antônio. "Gênese de horizontes subsuperficiais escurecidos em Argis-solos de Santa Catarina e em Luvissolo da Campanha Gaúcha." Universidade do Estado de Santa Catarina, 2012. http://tede.udesc.br/handle/handle/588.

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Made available in DSpace on 2016-12-08T15:50:02Z (GMT). No. of bitstreams: 1 PGMS12DA011.pdf: 7367606 bytes, checksum: b45b1b9688169baaebb35574e8cbd0e2 (MD5) Previous issue date: 2012-02-24<br>In the south of Brazil, there are soils presenting darker subsurface horizons than those overly-ing ones, being more representative in Ultisols. Those ones are placed in well-drained areas and do not present sodium saturation. In dark subsurface horizon, these soils shows morpho-logical aspects similar to sombric horizons, initially related to Central Africa. This fact arise the possibility of these so
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19

LEMOS, Janyelle de Oliveira. "Caracterização de gleissolos com e sem tiomorfismo da região litorânea do estado de Pernambuco." Universidade Federal Rural de Pernambuco, 2013. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/5147.

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Submitted by (lucia.rodrigues@ufrpe.br) on 2016-08-02T11:57:56Z No. of bitstreams: 1 Janyelle de Oliveira Lemos.pdf: 3894911 bytes, checksum: 9f9b7d66408b0015fd2de9373d685881 (MD5)<br>Made available in DSpace on 2016-08-02T11:57:56Z (GMT). No. of bitstreams: 1 Janyelle de Oliveira Lemos.pdf: 3894911 bytes, checksum: 9f9b7d66408b0015fd2de9373d685881 (MD5) Previous issue date: 2013-06-17<br>The floodplain soils of Pernambuco state - Brazil have been widely used to agriculture and their improperly management has promoted, in those with sulphidric materials, the sulfurization process, generati
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20

Severson, Erik D. "Hydropedology of Problematic Interfluve Transported Soils in the Central Virginia Piedmont." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/73101.

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Interpreting soil wetness in upland transported soils on flat broad summits in the central Piedmont of Virginia containing chroma ≥ 3 redoximorphic features (RMFs) can be difficult. It is imperative to understand their saturation regimes because onsite wastewater disposal systems, which are sited based upon soil evaluations, have failed prematurely when installed into these problematic soils. My objectives were to determine if soil morphology was an accurate predictor of soil wetness and permeability, to differentiate interpretations for colluvial soils from residual soils, and to determine th
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21

Marques, Flávio Adriano. "Matéria orgânica de Latossolos com horizonte A húmico." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-24022010-084403/.

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Latossolos com horizonte A húmico (LH) são solos com importantes reservas de carbono orgânico (CO) em profundidade. Esses solos são comuns nas regiões Sudeste e Sul do Brasil, com menor ocorrência no Nordeste. Aspectos da gênese e preservação da matéria orgânica (MO) desses solos não foram completamente entendidos ainda. Particularmente interessantes são os processos responsáveis pelo espessamento (hiperdesenvolvimento) e estabilidade do CO do horizonte húmico. A hipótese de que a MO do horizonte húmico tenha importante contribuição de carbono (C) de origem pirogênica é testada. O objetivo des
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22

Chiapini, Mariane. "Genesis and organic matter chemistry of sombric horizons in subtropical soils (Paraná State, Brazil)." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-18052017-184016/.

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Soil organic matter (SOM) plays an important role in the global carbon cycle. Therefore, it is important to understand the stability of SOM, which is related to several processes. Its intrinsic properties may be related to its stability, for example black carbon is considered to be relatively resistant to degradation. In most soils, the dark horizons coincide with the superficial layers or horizons due to the greater accumulation of organic matter, but in the southern states of Brazil, the presence of soils with dark subsurface horizons is frequently observed. The dark subsurface horizon of th
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23

Dadfar, Humaira. "The influence of variable B horizon thickness (tonguing) on solute transport through undisturbed soil columns." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq24456.pdf.

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24

Daniel, Catherine W. J. "Soil metabolic activity and properties of soil organic matter in the A1 horizon of reclaimed acid metalliferous mine tailings in the Sudbury area." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0022/MQ31423.pdf.

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25

Tacilla, Villanueva Antonio. "Impacts of Fertilization on Soil Properties in Loblolly Pine Plantations in the Southeastern United States." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/54020.

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We examined the effects of periodic nitrogen (N) and phosphorus (P) fertilizer applications on the O horizon and mineral soil in loblolly pine (Pinus taeda L.) plantations over a 12-year period. To accomplish this, we used 9 experimental sites located across the south, which were grouped using the CRIFF Classification System. Group 1—CRIFF A, B (poorly-drained Ultisols); group 2—CRIFF C, D, G (sandy Spodosols and Entisols); and group 3—CRIFF E, F (well-drained Ultisols). Fertilization rates were 135, 202, and 269 kg N ha-1 at 4 years application frequency. This resulted in a cumulative N appl
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26

Queiroz, Hernandes Andrade [UNESP]. "Caracterização fisiográfica e de alguns atributos físicos e químicos dos solos da microbacia Jardim Novo Horizonte, em Ilha Solteira, SP." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/98899.

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Made available in DSpace on 2014-06-11T19:29:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-09-04Bitstream added on 2014-06-13T20:39:20Z : No. of bitstreams: 1 queiroz_ha_me_ilha.pdf: 838869 bytes, checksum: fc8d0bce1dafbf9d2a62ce5729797a13 (MD5)<br>É inquestionável a degradação de mananciais devido à erosão e a poluição, decorrentes do desenvolvimento econômico. Estes fatos são caracterizados pelo mau planejamento dos recursos naturais, tanto em propriedades isoladas como nas microbacias. Como conseqüência, o impacto sócio-ambiental atraído pelos problemas de poluição e acúmulo d
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27

MENDONÇA, Suzana Kelly Gomes de. "Caracterização de Solos Tiomórficos da várzea do Rio Camocim, Caaporã, PB." Universidade Federal Rural de Pernambuco, 2011. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/5353.

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Submitted by (lucia.rodrigues@ufrpe.br) on 2016-08-16T14:23:12Z No. of bitstreams: 1 Suzana Kelley Gomes de Mendonca.pdf: 1457356 bytes, checksum: 55d06ce86944cd3f69644577e424587d (MD5)<br>Made available in DSpace on 2016-08-16T14:23:13Z (GMT). No. of bitstreams: 1 Suzana Kelley Gomes de Mendonca.pdf: 1457356 bytes, checksum: 55d06ce86944cd3f69644577e424587d (MD5) Previous issue date: 2011-02-25<br>Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq<br>Low lands in Brazil have a great potential for agriculture, however, they have some limitations due to the pres
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28

Lavaud, Aurélien. "Extraction et caractérisation de la matière organique soluble des horizons profonds d'un sol arable." Poitiers, 2010. http://theses.edel.univ-poitiers.fr/theses/2010/Lavaud-Aurelien/2010-Lavaud-Aurelien-These.pdf.

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L'augmentation de la concentration en CO2 atmosphérique due à la combustion des ressources fossiles et à la déforestation est aujourd'hui l'un des grands problèmes environnementaux. Pour stocker du carbone et ainsi diminuer la concentration du CO2 émis par l'activité humaine dans l'atmosphère, il faudrait pouvoir agir sur les puits de carbone situés dans la biosphère continentale. Le plus grand réservoir superficiel de carbone de la biosphère continentale est le sol, qui stocke 1500 Mt de carbone. Le potentiel des sols français à stocker du carbone est actuellement évalué pour l'horizon labour
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Frison, Anthony. "Analyse et modélisation des propriétés hydriques d'un horizon hétérogène de sol." Orléans, 2008. http://www.theses.fr/2008ORLE2070.

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Ce projet de recherche a consisté à déterminer les propriétés hydriques effectives de l’horizon E&Bt d’un Albeluvisol, horizon fortement hétérogène. La démarche employée a été i) de mesurer les propriétés hydriques des deux sous-unités homogènes de l’horizon (les Volumes Elémentaires Représentatifs, VPE), ii) de caractériser l’organisation 3-D de celui-ci et iii) de modéliser ses propriétés hydriques effectives selon l’approche du Scaleway. Les propriétés hydriques ont été obtenues par des mesures de laboratoire. En particulier, la détermination de la conductivité hydraulique en régime insatur
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Queiroz, Hernandes Andrade. "Caracterização fisiográfica e de alguns atributos físicos e químicos dos solos da microbacia Jardim Novo Horizonte, em Ilha Solteira, SP /." Ilha Solteira : [s.n.], 2008. http://hdl.handle.net/11449/98899.

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Resumo: É inquestionável a degradação de mananciais devido à erosão e a poluição, decorrentes do desenvolvimento econômico. Estes fatos são caracterizados pelo mau planejamento dos recursos naturais, tanto em propriedades isoladas como nas microbacias. Como conseqüência, o impacto sócio-ambiental atraído pelos problemas de poluição e acúmulo de macrofitas e assoreamento das microbacias, leva a própria destruição da drenagem. Neste sentido este trabalho teve como objetivos caracterizar a fisiografia e alguns atributos físicos e químicos dos principais solos de uma microbacia na cidade de Ilha S
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31

Moni, Christophe. "Stabilisation physique et physico-chimique de la matière organique dans les horizons profonds du sol." Paris 6, 2008. http://www.theses.fr/2008PA066196.

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La matière organique des sols (MOS) est un réservoir de carbone majeur dont la moitié se situe dans les horizons profonds du sol. A ce titre, la gestion des stocks de carbone organique (CO) du sol et en particulier ceux des horizons profonds du sol pourrait permettre de réguler les excès actuels de carbone dans l’atmosphère. Afin de mieux comprendre les processus de stabilisation des MOS dans le sol, la stabilisation par protection physique dans les agrégats et les nodules ferro-manganiques ainsi que la stabilisation par adsorption, ont été étudiées dans les deux premiers mètres d’un Cambisol
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Ribeiro, Rita Aparecida da Conceicao. "Identidade e resistência no urbano: o Quarteirão Soul em Belo Horizonte." Universidade Federal de Minas Gerais, 2008. http://hdl.handle.net/1843/MPBB-7CTHCY.

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A metropolização de alguns centros urbanos estabeleceu novas formas de relacionamento e percepção da cidade. O crescimento urbano, associado ao desenvolvimento tecnológico, atribui outros sentidos para a cidade, novas influências vão se delineando e criando diferentes parâmetros de sociabilidade. Tais parâmetros muitas vezes, se constituem a partir da fruição de produtos midiáticos. Assim, em Belo Horizonte, vemos surgir novos espaços, ou mesmo, antigos locais que se transformam pela apropriação de grupos formados pelo gosto comum por determinados produtos culturais. Este trabalho visa investi
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Junior, Afrânio Ferreira Neves. "Qualidade física de solos com horizonte antrópico (Terra Preta de Índio) na Amazônia Central." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-28072008-155658/.

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As Terras Pretas de Índio (TPI) apresentam por definição o horizonte A antrópico, de cor escura, com presença de artefatos líticos e/ou cerâmicos oriundos do processo de ocupação humana na Amazônia. As áreas que ocorrem se diferenciam dos solos adjacentes por exibirem e manterem condições químicas do solo adequadas ao crescimento de plantas, mesmo após vários anos de cultivo. Essa pesquisa testa a hipótese que de que as TPI exibem condições físicas do solo adequadas ao crescimento de plantas e, mais adequadas que às encontradas nos solos adjacentes. O objetivo deste estudo foi avaliar as propr
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34

Botelho, Márcio Ramos. "Gênese de horizontes subsuperficiais escuros de solos em área do Batólito Pelotas, RS." Universidade Federal de Pelotas, 2011. http://repositorio.ufpel.edu.br/handle/ri/1131.

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Made available in DSpace on 2014-08-20T13:25:36Z (GMT). No. of bitstreams: 1 Tese_Marcio_Ramos_Botelho.pdf: 7363575 bytes, checksum: 7093095943e8e185a759d62d75529be8 (MD5) Previous issue date: 2011-02-02<br>Dark subsurface horizons with morphological characteristics similar to sombric horizonts have been found in southern Brazil, particularly in the higher areas of the Pelotas Batholith, located in the eastern portion of the Escudo Sul-rio-grandense. The sombric horizon, initially identified by soil scientists who worked in the Belgian Congo, constitutes a diagnostic horizon in soil classi
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LOPES, MARIA BERNADETE LUCIANO. "INFLUENCE OF SUCTION ON THE SHEAR STRENGTH OF A FILITE RESIDUAL SOIL FROM BELO HORIZONTE, MG." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9536@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO<br>PROGRAMA DE APOIO A NÚCLEOS DE EXCELÊNCIA<br>FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE MINAS GERAIS<br>Neste trabalho, analisou-se a influência da sucção na resistência ao cisalhamento de um solo residual jovem de filito da região metropolitana de Belo Horizonte (MG). A fim de determinar a resistência ao cisalhamento do solo não saturado, foram realizados ensaios de cisalhamento direto com sucção controlada em amostras indeformadas e teor de umidade natural. Fora
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Coimbra, Kary Emanuelle Reis. "Dinâmica territorial urbana: análise do movimento quarteirão do soul em Belo Horizonte." Universidade Federal de Minas Gerais, 2013. http://hdl.handle.net/1843/BUOS-98ZFKB.

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The main objective of this work was analyze how is characterized, physical and symbolically, the territorial dynamics of Movimento Quarteirão do Soul, in Belo Horizonte. In 70s, soul music proms were popular downtown, but over time, were being purged to suburbs or being replaced by other musical and cultural styles emerged in the 80s. In order to retrieve the proms of that time, a group of friends decided to create a place where lovers of soul music could get together and dance again, to revive their youth, the trendy and the friendship of 70s proms. In this context the Quarteirão do Soul was
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MacDonald, James Douglas. "The partitioning of Cd, Cu, Pb and Zn between the solid and solution phase of forest floor horizons in podzolic soils near metal smelters /." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85575.

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The emission of trace metals (TMs) into boreal forest regions of the northern hemisphere is an important environmental issue due to their potential detrimental impacts on these sensitive ecosystems. One of the foremost factors controlling metal cycling is the chemistry of the overlying organic forest floor of the forest soil. In this thesis we examine the chemistry of forest floor horizons of podzolic soils. Our goal is to improve our ability to predict the partitioning of metals between the soil solid and solution phases.<br>We developed a standard protocol to produce solutions that re
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Costa, Carla Deisiane de Oliveira [UNESP]. "Escoamento superficial e risco de erosão do solo na sub-bacia Jardim Novo Horizonte, Município de Ilha Solteira-SP." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/93797.

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Made available in DSpace on 2014-06-11T19:26:47Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-02-05Bitstream added on 2014-06-13T20:34:43Z : No. of bitstreams: 1 costa_cdo_me_botfca.pdf: 1300395 bytes, checksum: 0fe30313cb9986cff1de4ec3408fa408 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Universidade Estadual Paulista (UNESP)<br>A Sub-Bacia Jardim Novo Horizonte está localizada no município de Ilha Solteira, noroeste do Estado de São Paulo. Esta região apresenta graves problemas ambientais, como erosão do solo e assoreamento dos rios, além da esca
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Silva, Sâmala Glícia Carneiro. "Caracterização físico-hídrica e fracionamento físico da matéria orgânica em solo com horizonte antrópico." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-28092016-155747/.

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Nos últimos anos o interesse pelo estudo da Terra Preta de Índio (TPI) tem aumentado em razão das suas características únicas em relação aos solos normalmente encontrados na região, como sua maior fertilidade natural. Diversos estudos relatam que a presença do chamado carbono pirogênico na composição das TPIs é a responsável por esta superioridade, entretanto ainda não se sabe se este afeta as propriedades físicas dos solos de TPI. Esta pesquisa tem como objetivo comparar o comportamento de propriedades físico-hídricas de solos antrópicos (Terra Preta de Índio) com um solo adjacente por meio d
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Costa, Carla Deisiane de Oliveira 1984. "Escoamento superficial e risco de erosão do solo na sub-bacia Jardim Novo Horizonte, Município de Ilha Solteira-SP /." Botucatu : [s.n.], 2010. http://hdl.handle.net/11449/93797.

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Orientador: Antônio de Pádua Sousa<br>Banca: Marlene Cristina Alves<br>Banca: João Antonio Galbiatti<br>Resumo: A Sub-Bacia Jardim Novo Horizonte está localizada no município de Ilha Solteira, noroeste do Estado de São Paulo. Esta região apresenta graves problemas ambientais, como erosão do solo e assoreamento dos rios, além da escassez de vegetação nativa. As classes de solos presentes na Sub-Bacia são o Latossolo Vermelho e o Argissolo Vermelho-Amarelo. A presente pesquisa foi realizada com o objetivo de estudar algumas propriedades físicas que interferem na dinâmica da água nos solos da Sub
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Reis, Rodrigo Martins. "Comportamento tensão-deformação de dois horizontes de um solo residual de gnaisse." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-06112006-163715/.

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Neste trabalho estuda-se o comportamento tensão-deformação de dois horizontes de um solo residual de gnaisse, pertencentes a um perfil típico da cidade de Viçosa-Minas Gerais, na condição saturada e sob diferentes valores de sucção. O estudo apóia-se em ensaios de caracterização física e mineralógica, em ensaios destinados às análises porosimétricas e morfológicas (lâminas delgadas), e em ensaios de compressão triaxial realizados em corpos de prova não saturados e saturados, estes sujeitos a diferentes direções de cisalhamento, em ambos solos, e distintas trajetórias de tensão, no solo jovem.
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MALA, ONGUENE. "Differenciations pedologiques dans la region de yaounde (cameroun) transformation d'un sol ferrallitique rouge en sol a horizon jaune et relation ave l'evolution du modele." Paris 6, 1993. http://www.theses.fr/1993PA066195.

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Dans la region de yaounde, sous un climat subequatorial humide et dans la transition des paysages a inselbergs et a collines a versants convexes, l'analyse morphostructurale d'une colline de 100 metres de denivelee montre qu'elle a subi au cours de son histoire des soulevements tectoniques suivis de la mise en place des fractures. Les consequences de ce desequilibre naturel sont: -le decapage des sols ferrallitiques rouges issus de l'isalterite par la pedoplasmation d'origine biologique secondee par l'accumulation de fer responsable de la couleur rouge de ces sols. Dans leur partie mediane, el
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Benton, Joshua Robert. "Temporal Dynamics of Groundwater Flow Direction in a Glaciated, Headwater Catchment." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/104222.

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Shallow groundwater flow in the critical zone of steep headwater mountain catchments is often assumed to mimic surface topography. However, groundwater flow is influenced by other variables, such as the elevation of the water table and subsurface hydraulic conductivity, which can result in temporal variations in both magnitude and direction of flow. In this study, I investigated the temporal variability of groundwater flow in the soil zone (solum) within the critical zone of a headwater catchment at the Hubbard Brook Experimental Forest in North Woodstock, NH. Groundwater levels were continu
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Vieira, Juliana Matos. "Contribution of low crystalline compounds and wetting and drying cycles in the genesis of the cohesive character in Cearà soils." Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10865.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>The Coastal Plains exhibit cohesive soils, which can cause physical impediments to root penetration and water dynamics. However, in the genesis of these horizons are not completely understood. Thus, the aim of the present study was to evaluate the influence of amorphous compounds in the genesis of cohesive horizons in soils of different textures of the Coastal Plains of CearÃ, as well as verify, through physical behavior of these soils in the presence and absence of these compounds. This study also aimed to evaluate the influence o
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García, Cira Hortênsia Pérez. "Características mineralógicas, químicas e físicas de solos com horizonte plíntico no município de Iranduba AM." Universidade Federal do Amazonas, 2008. http://tede.ufam.edu.br/handle/tede/2744.

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Made available in DSpace on 2015-04-11T13:56:27Z (GMT). No. of bitstreams: 1 Cira.pdf: 6338011 bytes, checksum: 212de9494be5146e828d9b10affa767f (MD5) Previous issue date: 2008-06-19<br>Fundação de Amparo à Pesquisa do Estado do Amazonas<br>Características mineralógicas, químicas, físicas e morfológicas foram determinadas em solos com horizonte plíntico do município de Iranduba, estado de Amazonas, tais solos foram até então pouco estudados. Foram selecionados quatro perfis representativos da região. Os três primeiros encontram-se situados em áreas de boa drenagem e o perfil quatro, em
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Santos, Rosângela Leal. "O uso de processamento digital de imagens do sensor Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) na identificação de horizontes coesos em solos dos tabuleiros costeiros da Bahia." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-16042017-085312/.

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Os Tabuleiros Costeiros são unidades geomorfologicamente definidas, caracterizando-se como formações sedimentares de topos aplainadas de grande extensão territorial, amplamente povoada, com intensa exploração econômica agropecuária, mas com a presença constante de restrições físicas ao uso agrícola, associadas à presença de solos com horizontes coesos em subsuperfície. A presença deste horizonte coeso reduz a profundidade efetiva dos solos, prejudicando a dinâmica da água no perfil e, principalmente, o aprofundamento do sistema radicular, reduzindo as taxas de infi
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Rajot, Jean-Louis. "Dissolution des oxydes de Fert (hématite et goethite) d'un sol ferralitique des llanos de Colombie par des bactéries ferri-réductrices : implication sur le jaunissement des matériaux pédologiques rouges." Nancy 1, 1992. http://www.theses.fr/1992NAN10401.

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Le jaunissement des horizons superficiels de sols rouges tropicaux est étudié sur des échantillons des llanos de Colombie ou ce phénomène est actuel. Dans ces sols, le nombre de bactéries ferri-réductrices est corrélé au stock de carbone organique. La réduction bactérienne du fer est obtenue par simple incubation du sol avec de l'eau distillée. Le facteur limitant son développement est la source de carbone. La réduction du fer se produit dans l'horizon rouge profond, très pauvre en bactéries ferri-réductrices, lorsqu'on ajoute aux incubations du glucose en faible concentration, simulant les co
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Bernoux, Martial. "Stocks de carbone des sols de l’Amazonie occidentale et leur dynamique lors de la conversion de la foret en pâturage." Orléans, 1998. http://www.theses.fr/1998ORLE2004.

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L’objectif de ce travail est l'évaluation des stocks de carbone (C) des sols de l’Amazonie occidentale et de leur dynamique lors de la conversion de la foret en pâturage. Le calcul des stocks de c, sur une épaisseur donnée de sol, nécessite la connaissance des teneurs en c et des densités apparentes (DA) pour l'ensemble des horizons considérés. Or, les DA sont très souvent absentes dans les études antérieures, ainsi que les teneurs en C pour certain nombre d'horizons. Il a donc fallu construire des outils permettant leur estimation. La DA a été estimée à l'aide de régressions multiples à parti
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Paula, Bruno Santos de. "Caracterização do carbono associado a horizontes espódicos profundos de solos da floresta amazônica, visando sua estabilidade." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/75/75135/tde-18082015-101731/.

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Este projeto nasceu inserido num contexto de crescentes pesquisas em direção à construção de um cabedal de conhecimento acerca das ciências ambientais que tratam e estudam a dinâmica dos reservatórios de carbono e suas contribuições para o Efeito Estufa. Extrapolações de novos mapas digitalizados de solos sugerem que os espodossolos hidromórficos da Amazônia podem estar com uma contagem de carbono subestimada em até 12,3 Pg de C e trabalhos anteriores mostram que o carbono imobilizado neste perfil pode sofrer mineralização devido ao corte na rede de drenagem ou rebaixamento do nível freático,
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Ndiaye, Babacar. "Etude experimentale et modelisation du comportement hydrodynamique des sols cultives : application au bassin de thysse kaymor (senegal)." Université Joseph Fourier (Grenoble), 2001. http://www.theses.fr/2001GRE10040.

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Le ruissellement et l'erosion sont a l'origine de pertes en terre et en fertilite des sols pendant la saison des pluies au sahel. Le role de l'encroutement sur l'infiltrabilite du sol a ete mis en evidence grace a 47 essais d'infiltration effectues sur le site de thysse kaymor. Les gradients de pression entre des microtensiometres, installes a differentes profondeurs pendant ces essais, ont permis de determiner la courbe de conductivite hydraulique proche de la saturation. Des essais d'evaporation wind portant sur 18 echantillons de sols ont permis de determiner les parametres des courbes de r
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