Content Horizon
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Spectroscopic techniques combined with chemometrics to study organic matter in tropical soils with different degrees of pedogenetic evolution
Understanding of the organomineral interactions in soil can elucidate the humic substances (HS) formation and the humification process. This study aimed to structurally characterize the humic acids (HA) formed in tropical soils with different pedogenesis degrees. The HA fraction was extracted from soil samples in the superficial horizons of an Inceptisol and
Química Nova. Publicado em: 2022
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2. Relief Position and Soil Properties under Continuous Banana Cropping in Subhumid Climate in Northeast Brazil
ABSTRACT Sequences of thick and eroded soils in hills surfaces are cultivated with banana since the beginning of the last century in the Northeast of Pernambuco (PE), Brazil. Measurements of soil properties depending on soil slope under intensive agricultural cultivation are limited mostly as the pedogenetic approach. This study aimed to identify the dominan
Rev. Bras. Ciênc. Solo. Publicado em: 09/09/2019
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3. La hegemonia en su mutuo anudamiento óntico-ontológico en la teoria política de Ernesto Laclau
Abstract: This article analyzes how the ontological and ontic planes are interconnected in Laclau’s political discourse theory. It is concluded that, on the ontological level, hegemony constitutes a political-discursive form of relative, precarious, contingent and partial universalization and articulation of particularities in empty signifiers that act as
Trans/Form/Ação. Publicado em: 15/07/2019
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4. Estimation of elemental composition of agricultural soils from West Azerbaijan, Iran, using mid-infrared spectral models
RESUMO A caracterização da composição elementar fornece informações úteis para caracterizar o grau de alteração dos solos. Em Miandoab, norte do Irã, esta caracterização não existe. Os objetivos deste trabalho foram avaliar o grau de intemperismo dos solos típicos da região usando a sua composição elementar e estimar esta composição usando
Rev. bras. eng. agríc. ambient.. Publicado em: 01/07/2019
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5. Estimation of precompression stress in an Ultisol cultivated with sugarcane
RESUMO Propriedades compressivas do solo são frequentemente utilizadas para entender o processo de compactação. Alternativamente a ensaios laboratoriais, funções de pedo-transferência têm sido usadas para estimar o comportamento mecânico em função de parâmetros físicos do solo. Este trabalho objetivou examinar o impacto da densidade (BD) e do con
Rev. bras. eng. agríc. ambient.. Publicado em: 06/05/2019
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6. Carbon Stocks and Pools in Relation to the Texture of Kaolinitic Soils from the Brazilian East Coast
ABSTRACT: Extremely kaolinitic soils of Tertiary age elevations on the Brazilian east coast present a wide range of texture, which is recognized as one of the main factors controlling the soil organic matter contents. This study aimed to investigate the organic C storage of different compartments of kaolinitic soils. The studied soils had a wide particle siz
Rev. Bras. Ciênc. Solo. Publicado em: 17/09/2018
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7. Surface Spectroscopy of Oxisols, Entisols and Inceptisol and Relationships with Selected Soil Properties
ABSTRACT: Traditional method of soil survey is expensive, slow, and must be carried out by experienced researchers. Thus, advances in soil observation technologies and the need to obtain information quickly by modern techniques have intensified the use of proximal sensing. This study characterized surface reflectance spectra (A horizon) and related them to t
Rev. Bras. Ciênc. Solo. Publicado em: 01/02/2018
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8. Soils Developed on Geomorphic Surfaces in the Mountain Region of the State of Rio de Janeiro
ABSTRACT: The evaluation of soils in representative landscapes constitutes an opportunity to evaluate spatial distribution, discuss formation processes, and apply this knowledge to land use and management. In this sense, from the perspective of an environmentally diversified region, the aim of the present study is to evaluate the occurrence and understand th
Rev. Bras. Ciênc. Solo. Publicado em: 08/01/2018
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9. Spatial Variability of Soil Properties in Archeological Dark Earth Sites under Cacao Cultivation
ABSTRACT Soils with an A horizon formed by human activity, an anthropogenic A horizon, are found in the Amazon Region. Few studies have examined the spatial distribution of the properties of these soils. We mapped the spatial variability of some soil properties in an area of Archaeological Dark Earth (ADE) in the Brazilian Amazon. A sampling grid was defined
Rev. Bras. Ciênc. Solo. Publicado em: 15/08/2016
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10. Planosols Developed in Different Geoenvironmental Conditions in Northeastern Brazil
ABSTRACT The semiarid region of northeastern Brazil has a large area occupied by Planosols, where in the State of Pernambuco these soils are mainly used for livestock farming and subsistence crops. The knowledge on these soils is limited, which compromises the understanding on their behavior, potentialities and limitations.This study aimed to analyze morphol
Rev. Bras. Ciênc. Solo. Publicado em: 2016
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11. Carbon pool ratios as scientific support to field morphology in the differentiation of dark subsurface soil horizons
In soil surveys, it is usual to find profiles with an uncommon disposition of horizons. Dark horizons in depth might be either the consequence of erosion and redeposition of soil materials from upslope or an indication of the podzolization process, which forms a spodic horizon. Few laboratory analyses are known to characterize dark subsurface horizons which
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-08
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12. "Salvar a la generación perdida": gubernamentalidad, empleabilidad y cultura del trabajo. El caso de un programa de empleo para jóvenes en Argentina
The aim of this article is to analyze how political and institutional logics associated with management and production of youth employment, work. We assume that these government interventions are designed attending mainly to employability and, moreover, they contribute to shape work culture. We analyze the case of a youth employment policy named Programa Jó
Rev. Sociol. Polit.. Publicado em: 2014-03