Soil Recovering
Mostrando 13-24 de 27 artigos, teses e dissertações.
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13. Modelação das deformações por colapso devidas à ascensão de lençol freático / Modeling of the collapse deformations due to rise of groundwater table
This thesis presents a case history of soil collapse that took place during and after reservoir filling of Três Irmãos dam in Brazil. The construction of this dam and subsequent reservoir filling has raised the local groundwater table up to 20 m, causing soil collapse that affected many buildings. Many field and laboratory tests were conducted to determine
Publicado em: 2007
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14. DOSSIÊ DE AMBIÊNCIA E TRANSIÇÃO AGROECOLÓGICA NO MANEJO DA MICROBACIA HIDROGRÁFICA DO LAJEADO BIGUÁ, ALECRIM-RS / AMBIENCE DOSSIER AND AGRO ECOLOGY TRANSITION IN THE MANAGEMENT IN THE WATERSHED OF LAJEADO BIGUÁ, ALECRIM - RS
The atrophic disordinated action over an area leads to degradation of the natural resources, mainly the soil, water and native vegetation, changing the landscape, altering the ambience and bringing negative consequences to the social and economical conditions of the population. In such context, the current study had as its aims assess, through an ambience do
Publicado em: 2007
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15. POTENCIAL DO Lupinus albescens Hook. &Arn. PARA RECUPERAÇÃO DE SOLOS ARENIZADOS DO BIOMA PAMPA.
As the productive processes move forward on the sandy soils of the Southwest region of Rio Grande do Sul, the arenização has been assuming relevance as factor of soil and regional ecosystem degradation. Contention measures should be established to avoid the progress of the arenização focuses and to recover the areas already damaged. Among these strategie
Publicado em: 2007
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16. DETERMINAÇÃO DE RESÍDUOS DE AGROTÓXICOS ORGANOCLORADOS EM LARANJA POR DISPERSÃO DE MATRIZ EM FASE SÓLIDA (MSPD) DISSERTAÇÃO DE MESTRADO ECOLOGIA E PRODUÇÃO SUSTENTÁVEL
This work shows the results achieved for the evaluation of organochlorine pesticides residue presence in oranges consumed in Goiânia. The method employed was based on the Matrix Solid Phase Dispersion extraction, MSPD, and analyzed by high resolution gas chromatography, GC. The studied pesticides were hexachlorobenzene, atrazine, heptachlor and its epoxide,
Publicado em: 2007
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17. Diversidade de rizóbios em Florestas de Araucária no Estado de São Paulo / Rhizobia diversity in Araucaria Forests in São Paulo State, Brazil
Araucaria angustifolia (B.) Ktz has a great social, environmental and economic importance to south and southeastern Brazil, although ecosystems supporting this species have been degraded by human activity, making it an endangered species. The nitrogen cycle has vital importance for life and has a special role in the development and upkeep of forests. The nit
Publicado em: 2007
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18. Composição, estrutura e aspectos ecológicos da mata ciliar do Rio Araguari no Triângulo Mineiro / Composition, structure and ecological aspects of forest riparian the Araguari River within Triângulo Mineiro region
The study aimed to characterize the tree-shrub community of a riparian forest, one of the last remnatns on the Araguari River, at Uberlândia, Triângulo Mineiro region, Minas Gerais State. The composition, horizontal and vertical structure were investigated by phytosociological survey of 110 plots of 10m x 10m (1,1ha). All trees with CAP ` 15 cm were regist
Publicado em: 2007
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19. Banco de dados de curvas de retenção de água de solos brasileiros / Database of soil-water retention curve of brazilian soils
Unsaturated soil mechanics has become an important subject of research devoted to understand the behavior of unsaturated soils and optimize their use in several civil works. The soil-water characteristic curve, defined as the relationship between the suction and the amount of water present in the soil, is considered as the key in the interpretation of the be
Publicado em: 2005
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20. Mechanical tillage of mining degraded areas at Jamari National Forest (Rondonia - BR) / Mecanização no preparo de solo em areas degradadas por mineração na Floresta Nacional do Jamari (Rondonia-BR)
The usage of a nation s natural resources directly implies the manipulation of natural environments on the terrestrial surface. In this scenario, estimates indicate that mining contributes to one percent of the degradation of the soils of the planet. It is observable that, although it seems to be a small number, this percentage denotes a high intensity of de
Publicado em: 2005
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21. Nitrogênio e enxofre na recuperação de pastagem de capim-Braquiária em degradação em Neossolo Quartzarênico com expressiva matéria orgânica / Nitrogen and sulphur for the recovery of a Signal grass under degradation in on Entisol with expressive organic matter content
Nitrogen is required for pastures establishment, maintenance and production recovery, and its effect has depended on sulphur supply, for the relationship between these nutrients in plant metabolism. The objectives were: a) to study the combinations between nitrogen and sulphur rates in soil with Signal grass (Brachiaria decumbens) under degradation; b) to ev
Publicado em: 2005
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22. Florística, fitossociologia e dinâmica de duas florestas secundárias antigas com histórias de uso diferentes no nordeste do Pará-Brasil. / Floristic, phitosociology and dinamic of two old secondary forests with different history of use in the northeastern Pará-Brazil.
The increase of the substitution from process amazonic forest by agricultural areas and their desertation afterwards have caused an increasing number of secondary forest fragments to happen. Aiming to contributing with the understanding of the diynamics of these areas, the floristic composition, the phitosociology, the ingrowth rate, the mortality rate, the
Publicado em: 2004
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23. Adsorption and desorption of arsenic in soils and substrates from gold mine and mitigation practices of acid drainage using leaching columns / Adsorção e dessorção de arsênio em solos e substratos de mineração de ouro e práticas de mitigação de drenagem ácida em colunas de lixiviação
This research was splited in two parts. The first one had as objectives: to adapt new methodologies to help on the understanding of As dynamic in soils and substrates; to evaluate the As adsorption and desorption in different soils and substrate from Paracatu MG. The second part had as objective to evaluate the effect of different insulating layer and geoche
Publicado em: 2002
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24. Density Centrifugation Method for Recovering Rhizobium spp. from Soil for Fluorescent-Antibody Studies †
A density centrifugation procedure has been developed as a replacement for soil flocculation and clarification steps employed in quantitative fluorescent-antibody studies on Rhizobium in soils. Near-quantitative recovery of added cells of two strains of Rhizobium japonicum and two strains of R. phaseoli was achieved from six soils with various properties. It