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Caracterização físico-hídrica de latossolo amarelo da região de Capitão Poço, Pará. Infoteca-e
COSTA, M. P. da; TEIXEIRA, L. B..
bitstream/item/42255/1/Boletim-Pesquisa-133-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Densidade aparente; Capitao Poco; Pará; Brasil; Oxysol; Organic mather; Analysis.; Análise; Água; Argila; Física; Matéria Orgânica; Latossolo Amarelo; Porosidade; Solo.; Amazonia; Bulk density; Clay; Porosity; Soil physics; Water..
Ano: 1992 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/380484
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Caracterización física y micromorfología de materiales orgánicos e inorgánicos para la generación de mezclas de sustratos en la producción de lisiathus (Eustoma grandiflorum) Colegio de Postgraduados
Anicua Sánchez, Rosa.
La producción de cultivos en maceta está relacionada con la selección de sustratos, que se basa en las propiedades físicas y en particular con el tamaño y la distribución de partículas, que determinan la retención y el movimiento de agua. Por lo que, el objetivo del presente trabajo fue la caracterización de materiales orgánicos e inorgánicos a partir de las propiedades físicas y micromorfológicas para la generación de mezclas en la producción de Lisianthus. Se realizó la caracterización de sustratos orgánicos (fibra de coco, peat moss, composta y vermicomposta) e inorgánicos (tezontle, piedra pómez, perlita y zeolita); con base en las propiedades físicas como densidad aparente (DA) y densidad real (DR) (Ansorena, 1994); espacio poroso total (EPT),...
Tipo: Tesis Palavras-chave: Sustratos; Curva de retención de humedad; Porosidad; Lisianthus; Micromorfología; Growing media; Waterrelease curve; Porosity; Lisianthus; Micromorphology.
Ano: 2008 URL: http://hdl.handle.net/10521/1408
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CHANGES IN PHYSICAL PROPERTIES OF A TYPIC HAPLOCAMBID BY ANNUAL CROP CULTURE J. Soil Sci. Plant Nutr.
Seguel,O; Baginsky,C; Contreras,A; Covarrubias,J; Gonzalez,C; Sandoval,M.
As an alternative to organic soil amendments used in the Copiapo Valley (northern Chile), this study analyzed the magnitude of changes in physical soil properties associated with different crop rotations on the rows on a grape orchard. The study was performed in the locality of Los Loros, Atacama Region, during the 2006-2008 seasons. In a Typic Haplocambid soil (2-5% slope, coarse loam) with a 6-year old grape plantation, a control and three crop rotations were established, each with four replicates. Soil samples were taken at three depths (0-10; 10-40; 40-60 cm), evaluating bulk density, penetration resistance, aggregate stability, pore size distribution and air and water flux. Crop rotation did not produce statistical differences in soil density compared...
Tipo: Journal article Palavras-chave: Porosity; Aggregate stability; Mechanical strength; Productivity.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162011000100001
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Correction of seabed layer thickness in processing subbottom profile data. OceanDocs
Wang, Fangqi; Qi, Faqing; Hu, Guanghai; Dong, Lifeng; Tao, Changfei.
The subbottom profiling is an important means of marine engineering survey, hazardous geology study and continental shelf scientific research. The accuracy of subbottom profile data interpretation has a direct impact on the research and investigation results. Because some of profilers’ transducer and hydrophone are separately installed, when the survey area is very shallow, distortion of shallow layers will be caused if it is seen as a self-excited and self-collected single-channel seismic system. According to the principle of subbottom profiler, the distortion correction formula is deduced and analyzed, providing actual value to using C-View software to interpret such subbottom profile data more accurately. In addition, the seabed sediments sound velocity...
Tipo: Journal Contribution Palavras-chave: Crustal thickness; Sound velocity; Porosity; Forecasting.
Ano: 2012 URL: http://hdl.handle.net/1834/5852
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Densidade aparente e porosidade do solo no desenvolvimento do milho. Infoteca-e
BAENA, A. R. C.; DUTRA, S..
bitstream/item/59280/1/CPATU-ComTec24.pdf
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Desenvolvimento; Densidade; Maize; Development; Growth.; Crescimento; Milho; Porosidade; Solo; Zea Mays.; Density; Porosity; Soil..
Ano: 1979 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376654
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Efeitos de diferentes sistemas de cultivo nas propriedades físicas e produtividade do solo. Infoteca-e
BAENA, A. R. C.; DUTRA, S.; KITAMURA, P. C..
bitstream/item/40430/1/Boletim-Pesquisa-67-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Propriedade física; Cultivo; Densidade; Capitão Poço; Pará; Brasil; Cultivation; Management; Physical proprierties; Yield.; Manejo; Latossolo Amarelo; Porosidade; Produtividade; Solo.; Amazonia; Density; Porosity; Soil..
Ano: 1985 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381693
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Effect of adding flours from marolo fruit (Annona crassiflora Mart) and jerivá fruit (Syagrus romanzoffiana Cham Glassm) on the physicals and sensory characteristics of food bars Ciênc. Tecnol. Aliment.
SILVA,Edson Pablo da; SIQUEIRA,Heloisa Helena; DAMIANI,Clarissa; VILAS BOAS,Eduardo Valério de Barros.
Abstract The marolo (Annona crassiflora Mart.) and jerivá (Syagrus romanzoffiana Cham Glassm) fruits grow in the Cerrado biome, and have important sensory and nutritional characteristics. These fruits are eaten fresh or processed and embedded in ice cream, candy, juices, and liquors. However, their use is very limited and is localized exclusively to their native region. The aim of this study was to evaluate the use of these fruits in food consumer products to improve the nutritional patterns of consumers and extend knowledge thereof. To do this, different levels (0%, 5%, 10%, 15%, and 20%) of flour derived from the marolo and jerivá fruits were incorporated into food bars, which were then characterized in terms of their physical of the texture (TPA),...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Flour; Savannah fruits; Porosity; Physical properties.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612016000100140
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Elastic stresses and plastic deformations in 'Santa Clara' tomato fruits caused by package dependent compression PAB
PEREIRA,ADRIANA VARGAS; CALBO,ADONAI GIMENEZ.
The objective of this work was to study the fruit compression behavior aiming to develop new tomato packages. Deformations caused by compression forces were observed inside packages and in individual 'Santa Clara' tomato fruit. The forces applied by a transparent acrylic lever to the fruit surface caused pericarp deformation and the flattened area was proportional to the force magnitude. The deformation was associated to the reduction in the gas volume (Vg), caused by expulsion of the air from the loculus cavity and reduction in the intercellular air volume of the pericarp. As ripening advanced, smaller fractions of the Vg reduced by the compressive force were restored after the stress was relieved. The lack of complete Vg restoration was an indication of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lycopersicon esculentum; Mechanical damage; Porosity; Storage losses.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000001200014
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Experimental and numerical characterization of an oyster farm impact on the flow ArchiMer
Gaurier, Benoit; Germain, Gregory; Kervella, Youen; Davourie, Julia; Cayocca, Florence; Lesueur, Patrick.
Shellfish farming, particularly oyster farms, suffers from strong siltation phenomena which are harmful to the production of shellfish. The lack of knowledge about the impact of an oyster farm on the wave propagation and on the flow remains a significant difficulty for the comprehension of sediment transport processes in coastal zones. These effects are one of the possible sources of sedimentation. The study presented here focuses on describing finely hydrodynamical phenomena (velocity fields, turbulence parameters) around oyster tables. The analysis is based on experimental trials carried out in a flume tank on reduced models of oyster tables. Experiments highlight the flow perturbations in the near field and constitute a database for validation of...
Tipo: Text Palavras-chave: Sediment dynamics; Oyster table; LDV measurement; Computational fluid dynamics; Porosity; Boundary layer.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00043/15421/12974.pdf
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INFLUENCE OF SUBSTRATE AND SPECIES ARRANGEMENT OF CULTIVATED GRASSES ON THE EFFICIENCY OF HORIZONTAL SUBSURFACE FLOW CONSTRUCTED WETLANDS REA
Saraiva,Claudety B.; Matos,Antonio T.; Matos,Mateus P.; Miranda,Suymara T..
ABSTRACT We aimed to evaluate the efficiency of six different horizontal subsurface flow constructed wetlands (HSSF-CWs), with different substrates (gravel and crushed PET bottles), which also varied in relation to the presence and arrangement of plant species (elephant grass and Tifton 85 bermudagrass) in the removal of pollutants from a bulk milk cooling tank (MTWW). Each bed was fed at a flow rate of 0.18 m3 d-1 and average organic load rate (OLR) of 318 kg ha-1 d-1 of BOD5, with hydraulic detention time (HRT) of 1.84 days in the gravel-filled HSSF-CWs (CWS-G) and 2.97 days in the PET-filled HSSF-CWs (CWs-P). The CWs-P were as efficient as the CWs-G in the removal of BOD5, COD, Total-P, and K-Total, being in some cases even more effective (turbidity,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Wastewater; Elephant grass; Tifton 85 bermudagrass; Plants; Porosity.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000300417
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Injection of liquid swine slurry and effects on properties of a Nitossolo Vermelho PAB
Rech,Cleber; Albuquerque,Jackson Adriano; Corrêa,Juliano Corulli; Mafra,Alvaro Luiz; Bortolini,Diego.
Abstract: The objective of this work was to evaluate the superficial and injected applications of swine slurry and urea to the soil, regarding their effects on the physical properties of a Nitossolo Vermelho distroférrico under a no-tillage system. The treatments were: injected slurry into the groove with a liquid swine slurry injector (LSSI); slurry on surface, applied on the lines by the LSSI kept raised; urea injected by opening the groove with the LSSI and distributed manually; and corn, under no-tillage, as a control. Sowing and the injection of liquid slurry or urea do not modify the organic carbon content, pH, and aggregation, but alter the soil bulk density and porosity in the mobilized line, and increase the macropores.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Porosity; Soil structure; Urea.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000400518
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Microporosity of BIF hosted massive hematite ore, Iron Quadrangle, Brazil Anais da ABC (AABC)
VARAJÃO,CÉSAR A.C.; BRUAND,ARY; RAMANAIDOU,ERICK R.; GILKES,ROBERT J..
Massive hematite ore (MHO) is a special high-grade iron ore, used as lump ore in the process of obtaining direct reduction iron (DRI). The influence of porosity on the reducibility of MHO from the Capitão do Mato Mine (Iron Quadrangle, Brazil) was investigated using optical and scanning electron microscopes on drill core and open pit samples. Hematite is the main component of the samples and occurs as granular crystals (10 mum), microplates (1 mum) and euhedral martite (10 to 30 mum). Quartz, maghemite, kenomagnetite and goethite are minor components. Primary micropores (Å to 1 mum) are associated with microplaty crystals that fill cavities between granular hematite. Secondary micropores (Å to 5 mum) related to euhedral martite crystals, are the most...
Tipo: Info:eu-repo/semantics/article Palavras-chave: BIF; Porosity; Massive hematite ore; Direct reduction iron; Reducibility.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000100008
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Mineralogy of the clay fraction of alfisols in two slope curvatures: IV - spatial correlation with physical properties Rev. Bras. Ciênc. Solo
Camargo,Livia Arantes; Marques Júnior,José; Pereira,Gener Tadeu.
Although the influence of clay mineralogy on soil physical properties has been widely studied, spatial relationships between these features in Alfisols have rarely been examined. The purpose of this work was to relate the clay minerals and physical properties of an Alfisol of sandstone origin in two slope curvatures. The crystallographic properties such as mean crystallite size (MCS) and width at half height (WHH) of hematite, goethite, kaolinite and gibbsite; contents of hematite and goethite; aluminium substitution (AS) and specific surface area (SSA) of hematite and goethite; the goethite/(goethite+hematite) and kaolinite/(kaolinite+gibbsite) ratios; and the citrate/bicarbonate/dithionite extractable Fe (Fe d) were correlated with the soil physical...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aggregates; Mineral crystallinity; Density; Porosity; Penetration resistance; Cross-semivariogram.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000200002
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Physical attributes of kaolinitic and oxidic oxisols resulting from different usage systems BABT
Centurion,José Frederico; Beutler,Amauri Nelson; Souza,Zigomar Menezes de.
The objective of this study was to assess the physical attributes of a kaolinitic oxisol, medium texture (Haplustox) and an oxidic oxisol, clayey (Eutrustox) under different usage systems, localized in the region of Jaboticabal, SP, Brazil. The usage systems were sugarcane, cotton and forest. Parameters such as soil bulk density, total porosity, macro and microporosity at the depths of 0.0-0.1; 0.1-0.2; 0.2-0.3, and 0.3-0.4 m were evaluated. Haplustox showed greater bulk density and smaller total porosity, macro and microporosity. The usage increased the bulk density in 0.0-0.3 m depth, with greater effects on the kaolinitic oxisol, mainly in 0.1-0.2 m depth in the areas cultivated with sugarcane.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sugarcane; Cotton; Forest; Mineralogy; Porosity; Bulk density.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000500007
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Physical properties of a rhodic haplustox under two sugarcane harvesting systems Rev. Bras. Ciênc. Solo
Machado,Walquíria; Telles,Tiago Santos; Tavares Filho,João; Guimarães,Maria de Fátima; Alves,Grace Bungenstab; Borges,José Luiz Bernardo.
This study had the purpose of evaluating the effects of two management types of sugarcane: harvesting of burnt cane (BCH) and mechanized harvesting of unburnt green cane (MCH), on some soil physical properties of a dystrophic Rhodic Haplustox. The data were then compared with results for the same soil type under native forest. A completely randomized design was used, with three treatments and 20 replications. The following characteristics were determined: organic matter, aggregate stability, soil bulk density, and porosity at depths of 0-0.20 m and soil penetration resistance. After 15 years of cultivation, there were some alterations in the soil under cane burnt before harvesting, evidenced by a drop in the weighted average diameter of stable aggregates...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Saccharum officinarum; Soil bulk density; Porosity; Soil penetration resistance; Soil aggregate stability.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000600004
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Propriedades físicas dos principais solos da Amazônia brasileira em condições naturais. Infoteca-e
BAENA, A. R. C.; DUTRA, S..
bitstream/item/31900/1/CPATU-BP33.pdf
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Propriedade física; Densidade; Brasil; Resistance; Physical proprieties; Yield.; Produtividade; Porosidade; Resistência; Solo.; Amazonia; Density; Porosity; Soil..
Ano: 1982 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381146
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Quantificação do índice de vazios do solo utilizando técnicas de processamento de imagens digitais. Infoteca-e
CARVALHO JUNIOR, O. A. de; CARDOSO, F. B. da F.; MARTINS, E. de S.; JUNQUEIRA, F. de F.; CARVALHO, A. P. F. de; REATTO, A.; GUIMARAES, R. F..
RESUMO: Este trabalho apresenta uma abordagem metodológica para obter o índice de vazios de solo (e) utilizando técnicas de processamento de imagens. Como esse método permite uma obtenção automática, o procedimento pode ser considerado mais fácil, mais rápido e mais preciso que técnicas convencionais. A metodologia está baseada na classificação supervisionada de áreas de vazios presentes em seções delgadas de solo. A metodologia pode ser resumida nos passos seguintes: (a) elaboração de seção delgada da amostra de solo (se a porosidade do solo tiver um padrão anisotrópico, várias lâminas devem ser confeccionadas seguindo o eixo de comprimento preferencial; (b) são fotografadas as seções delgadas e gravadas em formato digital em RGB; (c) a imagem colorida é...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Imagem digital; Digital image; Chemicophysical properties.; Cerrado; Propriedade Físico-Química; Porosidade; Sensoriamento Remoto; Solo.; Remote sensing; Porosity; Soil..
Ano: 2002 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567773
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Relationship between thermal properties of canola pods (without seed) with moisture content, porosity and chemical composition of pods CIGR Journal
Azadbakht, Mohsen; Ghajarjazi, Ehsan; Ghaderi-Far, Farshid.
Thermal properties of canola pods including coefficients of thermal conductivity, thermal diffusivity and specific heat and chemical composition of rapeseed pods were measured at three levels of conventional canola varieties cultivated in the north of Iran (Hyola 50, Hyola 401 and Hyola 420) and in three times before harvest, while harvest and post-harvest. Then the relationship between the thermal properties of canola pods with chemicals, moisture and porosity were investigated. Conductivity coefficient was resulted from linear thermal method, the specific heat was obtained from mixing method and diffusion coefficients were calculated by the formula. The results showed that changes of variety and time of sampling were significant on thermal conductivity...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Thermal conductivity; Specific heat; Thermal diffusivity; Canola pod; Chemical composition; Porosity.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3613
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Revisiting the S-index for soil physical quality and its use in Brazil Rev. Bras. Ciênc. Solo
Jong van Lier,Quirijn de.
The S-index was introduced in 2004 in a publication by A.R. Dexter. S was proposed as an indicator of soil physical quality. A critical value delimiting soils with rich and poor physical quality was proposed. At present, Brazil is world leader in citations of Dexter's publication. In this publication the S-theory is mathematically revisited and extended. It is shown that S is mathematically correlated to bulk density and total porosity. As an absolute indicator, the value of S alone has proven to be incapable of predicting soil physical quality. The critical value does not always hold under boundary conditions described in the literature. This is to be expected because S is a static parameter, therefore implicitly unable to describe dynamic processes. As a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Porosity; Density; Water retention curve; Compaction.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100001
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SEM observation of grain boundary structures in quartz-iron oxide rocks deformed at intermediate metamorphic conditions Anais da ABC (AABC)
Lagoeiro,Leonardo; Gonçalves,Cristiane C..
Several studies have demonstrated the effect of a second phase on the distribution of fluid phase and dissolution of quartz grains. However, as most observations came from aggregates deformed under hydrostatic stress conditions and mica-bearing quartz rocks, 3-D distribution of pores on quartz-quartz (QQB) and quartz-hematite boundaries (QHB) has been studied. Several fracture surfaces oriented according to finite strain ellipsoid were analyzed. The pore distribution characterizes the porosity and grain shape as highly anisotropic, which results from the nature and orientation of boundaries. QHB have physical/chemical properties very different from QQB, once the hematite plates have strong effect on wetting behavior of fluid, likewise micas in quartzites....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Deformation mechanisms; Fluid distribution; Grain growth; Porosity; Solution transfer.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300009
Registros recuperados: 29
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