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| Registros recuperados: 10 | |
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| Zenero,Mariana Delgado Oliveira; Silva,Laura Fernanda Simões da; Castilho,Selene Cristina de Pierri; Vidal,Alix; Grimaldi,Michel; Cooper,Miguel. |
| ABSTRACT: Knowledge of soils in the Amazon rainforest is becoming increasingly essential due to dynamics adopted by farmers that substitute forest for pastures, together with growing pressure from diverse segments of society towards adoption of sustainable production systems. The objective of this study was to characterize the soils along two toposequences, one under forest (F) and the other under pasture (P), and to verify how the change in land use influences soil attributes, evaluating their inclusion in the Brazilian Soil Classification System (SiBCS). The soils were sampled in pits located at the summit, backslope and footslope positions for morphological, chemical, physical, and clay mineralogy analysis. The results show that the soils are chemically... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Argissolos; Ultisols; Southeast of Pará; Soil classification; Saprolitic character; Aquic with episaturation (epirredóxico) character. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100314 |
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| Silva,Laura Fernanda Simões da; Marinho,Mara de Andrade; Matsura,Edson Eiji; Cooper,Miguel; Ralisch,Ricardo. |
| In evaluation of soil quality for agricultural use, soil structure is one of the most important properties, which is influenced not only by climate, biological activity, and management practices but also by mechanical and physico-chemical forces acting in the soil. The purpose of this study was to evaluate the influence of conventional agricultural management on the structure and microstructure of a Latossolo Vermelho distroférrico típico (Rhodic Hapludox) in an experimental area planted to maize. Soil morphology was described using the crop profile method by identifying the distinct structural volumes called Morphologically Homogeneous Units (MHUs). For comparison, we also described a profile in an adjacent area without agricultural use and under natural... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crop profile method; Soil structure; Image analysis; Conventional system. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100205 |
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| Bovi,Renata Cristina; Silva,Laura Fernanda Simões da; Zenero,Mariana Delgado Oliveira; Carvalho,Camila Carolina de; Cooper,Miguel. |
| Abstract Erosion generates large amounts of sediment, which may be deposited at the site of origin, on the slope of a hill, or along waterways. The transportability of each type of sediment by runoff and its potential for subsequent deposition largely depends on its morphological features and particle size distribution. The aim of this study is to describe and characterize the morphology and micromorphology of sediments deposited in a reforested area and to understand the dynamics of the transport process. In order to understand the sedimentation processes, the following analyses were performed: particle size distribution, with and without the use of a dispersant solution; statistical analysis of the sand fraction using Folk and Ward parameters; sediment... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil erosion; Sedimentation; Particle size; Silting. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100526 |
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| Oliveira,Thalita Campos; Silva,Laura Fernanda Simões da; Cooper,Miguel. |
| The concept of soil quality is currently the subject of great discussion due to the interaction of soil with the environment (soil-plant-atmosphere) and practices of human intervention. However, concepts of soil quality relate quality to agricultural productivity, but assessment of soil quality in an agronomic context may be different from its assessment in natural areas. The aim of this study was to assess physical quality indices, the S index, soil aeration capacity (ACt/Pt), and water storage capacity (FC/Pt) of the soil from a permanent plot in the Caetetus Ecological Reserve (Galia, São Paulo, Brazil) under a seasonal semideciduous forest and compare them with the reference values for soil physical quality found in the literature. Water retention... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: S index; ACt/Pt; FC/Pt; Water retention curve. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200009 |
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| Gennaro,Lorena Adriana de; Souza,Zigomar Menezes de; Silva,Laura Fernanda Simões da; Cooper,Miguel; Campos,Milton César Costa. |
| O manejo agrícola influencia a estrutura do solo, modificando os atributos físicos e o comportamento hídrico do solo. O objetivo deste trabalho foi avaliar os efeitos da semeadura direta (SD) e do preparo convencional (PC) sobre a estrutura do solo, por meio de atributos físicos e da distribuição dos poros, utilizando imagens digitais 2-D. O estudo foi realizado em um Latossolo Vermelho distroférrico com delineamento de blocos casualizados. A densidade do solo, macroporosidade, diâmetro médio ponderado (DMP), condutividade hidráulica do solo saturado (Kfs) e análise de imagens digitais 2-D (resolução de 156,25 μm2) foram avaliadas nas profundidades de 0-0,20 e 0,20-0,40 m. Os manejos não diferiram para a densidade e macroporosidade do solo. A SD revelou... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Preparo convencional; Semeadura direta; Análise de imagem; Monólitos; Phaseolus vulgaris. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000200608 |
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| Vieira,Marineide Rosa; Correa,Luiz de Souza; Castro,Tatiane Marie Martins Gomes de; Silva,Laura Fernanda Simões da; Monteverde,Maria de Souza. |
| O efeito do cultivo do mamoeiro em ambiente protegido foi estudado em três condições: sem cobertura e em dois telados construídos com tela de propileno branca, com malhas de 2 x 2 mm e 2 x 1 mm. Nessa área foram feitas avaliações na cultivar Baixinho de Santa Amália, contando-se o número de plantas com sintomas de ataque recente, para o ácaro branco Polyphagotarsonemus latus, com sintomas e presença de ácaros, para o ácaro rajado Tetranychus urticae e com presença de adultos ou ninfas nas folhas, no caso das moscas-brancas Trialeurodes sp., Bemisia tabaci biótipo B e uma terceira espécie não identificada. Para moscas-brancas, também foram realizadas contagens de ninfas e exúvias em laboratório. O cultivo em ambiente protegido favoreceu a sobrevivência e o... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Telado; Ácaro branco; Ácaro rajado; Bemisia; Trialeurodes. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452004000300017 |
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| Cooper,Miguel; Boschi,Raquel Stucchi; Silva,Laura Fernanda Simões da; Toma,Raul Shiso; Vidal-Torrado,Pablo. |
| ABSTRACT: Knowledge of the hydraulic properties of the soil is of crucial importance to an understanding of the interactions between vegetation, soil and water. There is little information available about the hydraulic properties of Podzol soils found in tropical regions. The aim of this study was to present the soil morphology and hydraulic properties of a toposequence situated in a permanent plot at the Ilha do Cardoso State Park (Cananéia, SP, Brazil). Ultradetailed soil maps were used to define a toposequence inside the permanent plot. Five profiles, representing the main types of soil, were opened along the toposequence, in which Podzols are dominant. The levels of bulk density, sand content, porosity and permeability in these soils were all high.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Podzols; Soil morphology; Soil hydraulic properties. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000500393 |
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| Cooper,Miguel; Boschi,Raquel Stucchi; Silva,Vitor Boschi da; Silva,Laura Fernanda Simões da. |
| ABSTRACT Studies of soil porosity through image analysis are important to an understanding of how the soil functions. However, the lack of a simplified methodology for the quantification of the shape, number, and size of soil pores has limited the use of information extracted from images. The present work proposes a software program for the quantification and characterization of soil porosity from data derived from 2-D images. The user-friendly software was developed in C++ and allows for the classification of pores in terms of size, shape, and combinations of size and shape. Using raw data generated by image analysis systems, the software calculates the following parameters for the characterization of soil porosity: total area of pore (Tap), number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil structure; Soil thin sections; Soil porosity data; Pore morphology. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000400388 |
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| Marques,Sebastião Rovilson; Weill,Mara de Andrade Marinho; Silva,Laura Fernanda Simões da. |
| O manejo agrícola interfere nas condições físicas, químicas e biológicas do solo, na capacidade produtiva do sistema agrícola e na susceptibilidade do solo ao processo erosivo, não raramente acentuando-a. Objetivou-se, neste estudo, estudar a influência de dois sistemas de manejo sobre a qualidade física de um Latossolo Vermelho Distroférrico típico da região de Campinas, SP, bem como seus efeitos tanto no desenvolvimento e produtividade da cultura do milho, quanto no controle das perdas de terra e de nutrientes por erosão. Foram comparados dois sistemas de manejo, sistema plantio direto (SPD) e sistema convencional com grade aradora (SC), aplicando-os em parcelas experimentais dotadas com sistemas coletores de enxurrada para avaliação das perdas de terra... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sistema plantio direto; Sistema convencional; Compactação do solo; Indicadores de qualidade. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542010000400024 |
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| Registros recuperados: 10 | |
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