Latosols
Mostrando 13-24 de 33 artigos, teses e dissertações.
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13. Sorption and mobility of ametryn in latosols with different physical and chemical characteristics / Sorção e mobilidade do ametryn em latossolos com diferentes características físicas e químicas
Objetivou-se com este trabalho avaliar a sorção e a mobilidade do ametryn em quatro tipos de solos [Latossolo Vermelho-Amarelo (LVA), Latossolo Vermelho- Amarelo Húmico (LVAh), Latossolo Vermelho (LV) e Latassolo Amarelo (LA)], com valores de pH natural e corrigido. Para isso, amostras destes solos foram coletadas à profundidade de 0-20 cm, caracterizada
Publicado em: 2009
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14. Gênese, classificação e mapeamento de solos desenvolvidos de rochas pelíticas em áreas cultivadas com eucalipto em Minas Gerais / Genesis, classification and mapping of soils developed from pellitic rocks in areas cultivated with eucalyptus in Minas Gerais
Because the demand for arable areas has turned very intense in the last years, soils then considered as not appropriate to agricultural use are now being revalued and studied in order to use them for forest plantings, to example of Cambisols developed from pellitic rocks of Bambui Group. In reason of the expressiveness of these soils, usually associated Lato
Publicado em: 2008
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15. Dispersing chemicals in the granulometric analysis of latosols / Dispersantes químicos na análise granulométrica de latossolos
The most accurate textural analysis result is dependent on the soil samples complete dispersal and maintenance of the dispersed phases stability. The solutions high pH can be considered to be determinant in the dispersion of soils with pH dependent loads. Under the same pH and osmotic pressure conditions, the higher the ions ionic hydrated radius, the more e
Publicado em: 2008
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16. Espectroscopia Mössbauer na caracterização de compostos ferrosos em solos e sua relação com retenção de fósforo
The chemical role of iron-bearing compounds on the dynamics of phosphorus in selected Brazilian latosols was investigated. The iron oxides were characterized in an attempt to assess their main chemical-mineralogical properties influencing the ion sorption mechanisms in those pedosystems. It was found that increasing total iron contents tend to increase the p
Química Nova. Publicado em: 2008
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17. K release in Latosols treated with organic residues. / LiberaÃÃo de PotÃssio em Latossolos Tratados com ResÃduos OrgÃnicos
A taxa de liberaÃÃo de K varia de um resÃduo orgÃnico para outro e se mostra dependente do grau de humificaÃÃo, da composiÃÃo quÃmica e do teor e das formas de K no material estudado. Este estudo foi realizado com o objetivo de avaliar o potencial e a dinÃmica de liberaÃÃo de potÃssio de diferentes resÃduos e adubos orgÃnicos incubados em amos
Publicado em: 2008
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18. Conhecimentos na análise de ambientes: a pedologia e o saber local em comunidade quilombola do norte de Minas Gerais / Knowledge in the environment analysis: the pedology and local knowledge in the quilombola community on northern Minas Gerais
Theren increasing incorporation and appropriation of the epistemologies towards the sustainability, valorization of the man-environment relationships and the perception of the need for maintaining the complexity of the productive systems in response to the environmental degradation process, aggravated by practices of the reductionist paradigms. Local knowled
Publicado em: 2008
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19. Matéria orgânica de Latossolos Húmicos: análises térmica e espectroscópica, efeito do uso e correção química / Organic matter of humic Latosol (Oxisol): thermal and spectroscopic analyses, land use and chemical correction
The objective of this study was to contribute to the clarification of several aspects related to the behavior of organic matter (OM) in highly weathered tropical soils. Six samples of humic A horizon Latosol were collected from three sites in Minas Gerais: i) Sericita, (under coffee crop, pasture, ferns and Atlantic Forest fragment); ii) Mutum (under Atlanti
Publicado em: 2008
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20. Changes in the soil carbon stocks due to agricultural land use in the Southwest Amazonian / Mudança no estoque de carbono do solo devido ao uso agrícola da terra no Sudoeste da Amazônia
Land use changes such as conversion of natural ecosystems to agro ecosystems are shown to cause alterations in the transformations of soil organic matter (SOM), as well they are responsible for crescent emissions of greenhouse gases (GEE), therefore representing around 20% of total GEE emissions. Over the last 30 years, land deforestation has occurred more i
Publicado em: 2008
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21. Soils and environments of the Ferriferous Quadrangle (MG) and forestry suitability of the Coastal Plains / Solos e ambientes do QuadrilÃtero FerrÃfero (MG) e aptidÃo silvicultural dos Tabuleiros Costeiros
Two quite different Brazilian environments were approached in this work: the Ferriferous Quadrangle, located in the center-south portion of the State of Minas Gerais, and Coastal Plains, which extend in narrow strip along the coast from the State of Rio de Janeiro to AmapÃ. The first was studied in a more general context, with respect to the distribution of
Publicado em: 2008
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22. Impact of use and management on the organic matter fractions of latosols from the Rio das Mortes Basin. / Impacto de uso e manejo em fraÃÃes da matÃria orgÃnica de latossolos da Bacia do Rio das Mortes - MG
Rio das Mortes basin is an important area of coffee and potato production in Minas Gerais state (Brazil). In these crops, it is frequent the application of lime and phosphorus, as well as the use of practices of intensive revolving of soil, especially in potato croplands. Although these management practices are important for agricultural process, they affect
Publicado em: 2007
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23. Levantamento de solos em sub-bacias hidrogrÃficas como apoio para avaliaÃÃo do uso da terra e da potencialidade da recarga de aqÃÃferos. / Soil survey in hydrografic watersheds as support to evaluation of land use and aquiferous recharge potencial.
The knowledge of natural resources, mainly soil water, is fundamental for a better evaluation of land use in sustainable basis, indicating its potential and limitations for agricultural and non-agricultural exploration. This evaluation can be improved by the use of Land Agricultural Vocation Evaluation System, in which the differential impacts of limitations
Publicado em: 2007
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24. Spatial variability in compressive behavior in two latosols (Oxisols) under different uses / Variabilidade espacial do comportamento compressivo de dois Latossolos sob diferentes usos.
O aumento na intensidade de trÃfego na agricultura moderna tem trazido problemas quanto à preservaÃÃo da estrutura do solo, principalmente quando realizado sob condiÃÃes inadequadas de umidade, podendo ocasionar uma reduÃÃo na produtividade das culturas. A pressÃo de preconsolidaÃÃo vem se destacando como uma metodologia capaz de prevenir a compac
Publicado em: 2007