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Aggregate breakdown and dispersion of soil samples amended with sugarcane vinasse Scientia Agricola
Ribeiro,Bruno Teixeira; Lima,José Maria de; Curi,Nilton; Oliveira,Geraldo César de.
Soil aggregation is a very complex issue related to important soil attributes and processes. The aggregate breakdown and dispersion of soil samples amended with sugarcane vinasse were evaluated using ultrasonic energy. Vinasse is an important byproduct of sugarcane industries, intensively applied to soils in Brazil as liquid fertilizer. Samples of two Oxisols and one Ultisol were used in this study. The physical and chemical characterization of soils was performed, and the 1 to 2 mm size aggregates (200 g) were packed in PVC columns (6.0 cm high and 4.0 cm internal diameter) and incubated with sugarcane vinasse under lab conditions for 1, 30 and 60 days. After incubation, aggregates were submitted to levels of ultrasonic energy, and the particle size...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil-aggregate hierarchy; Soil structure; Aggregate stability; Dispersive energy.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000600009
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Aggregate stability as affected by short and long-term tillage systems and nutrient sources of a hapludox in southern Brazil Rev. Bras. Ciênc. Solo
Veiga,Milton da; Reinert,Dalvan José; Reichert,José Miguel.
The ability of a soil to keep its structure under the erosive action of water is usually high in natural conditions and decreases under frequent and intensive cultivation. The effect of five tillage systems (NT = no-till; CP = chisel plowing and one secondary disking; CT = primary and two secondary distings; CTb = CT with crop residue burning; and CTr = CT with removal of crop residues from the field), combined with five nutrient sources (C = control, no nutrient application; MF = mineral fertilizers according to technical recommendations for each crop; PL = 5 Mg ha-1 y-1 fresh matter of poultry litter; CM = 60 m³ ha-1 y-1 slurry cattle manure; and SM = 40 m³ ha-1 y-1 slurry swine manure) on wet-aggregate stability was determined after nine years (four...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil tillage; Manure; Sampling time; Soil structure; Aggregation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000400003
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Aggregate Stability in Soil with Humic and Histic Horizons in a Toposequence under Araucaria Forest Rev. Bras. Ciênc. Solo
Hanke,Daniel; Dick,Deborah Pinheiro.
ABSTRACT Aggregate stability is one of the most important factors in soil conservation and maintenance of soil environmental functions. The objective of this study was to investigate the aggregate stability mechanisms related to chemical composition of organic matter in soil profiles with humic and histic horizons in a toposequence under Araucaria moist forest in southern Brazil. The soils sampled were classified as Humic Hapludox (highest position), Fluvaquentic Humaquepts (lowest slope position), and Typic Haplosaprists (floodplain). The C and N contents were determined in bulk soil samples. The chemical composition of soil organic matter was evaluated by infrared spectroscopy. Aggregate stability was determined by applying increasing levels of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carbon; Soil structure; Ultrasound energy; Organo-mineral interaction; Hydrophobicity.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100412
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Aggregation and organic matter under alfisol soil tillage for Eucalyptus plantation PFB - Pesquisa Florestal Brasileira
Prevedello, Juliana; Vogelmann, Eduardo Saldanha; Kaiser, Douglas Rodrigo; Fontanela, Eracilda; Reinert, Dalvan José; Reichert, José Miguel.
Aggregation can suffer permanent or temporary changes to cyclical variations induced by management practices for soil and plant growth. The study evaluated the temporal and spatial variation of the stability of water stable aggregates and its relationship with the organic matter content in an Hapludalf in Santa Maria municipality, Rio Grande do Sul State, Brazil. The treatments were four tillage systems for deployment of Eucalyptus grandis: no-tillage, chisel, chisel tillage plus harrowing and rotary tiller. Soil samples were collected in the layer of 0.00 to 0.05 m for determination of the density, and stability in water of stable organic matter aggregates contents of the soil. Chisel, chisel tillage plus harrowing and rotary tiller resulted in lower...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil management; Aggregate stability; Soil structure; Eucalyptus grandis Recursos Florestais Engenharia florestal Solos Florestais Manejo do solo; Estabilidade de agregados; Estrutura do solo; Eucalyptus grandis.
Ano: 2014 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/456
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Arbuscular mycorrhizal fungus in microbial activity and aggregation of a Cerrado Oxisol in crop sequence Ciência e Agrotecnologia
Vilela,Laíze Aparecida Ferreira; Saggin Júnior,Orivaldo José; Paulino,Helder Barbosa; Siqueira,José Oswaldo; Santos,Vera Lúcia da Silva; Carneiro,Marco Aurélio Carbone.
Soil structure has major influence on ecosystem sustainability and plant growth. Arbuscular mycorrhizal fungi (AMF) are an important functional group of soil microbiota, acting in the process of aggregation, especially in agroecosystems and related to the production and plant diversity. AMF are widely distributed in tropical agroecosystems and are extremely important for development of many agricultural crops. The present study evaluated the effect of inoculation with Glomus macrocarpum in different crop sequences on plant growth, microbial activity and aggregation of a Cerrado Oxisol. The study was conducted in a completely randomized design in a4 x 4 factorial scheme. Treatments consisted of four conditions of elimination and/or introduction of AMF...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial carbon; Acid phosphatase; Mean geometric diameter; Mean weight diameter; Soil structure.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000100004
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Can the Quick Diagnosis of Soil Structure (DRES) method describes the soil quality of Brazilian pastures? Repositório Alice
VALLE, T. R. de S.; RODRIGUES, R. de A. R.; BALIEIRO, F. de C.; FONTANA, A.; SANTOS, M. L.; DONAGEMMA, G. K..
Soil structure is related to many soil ecosystem services and has been used as manageable property in evaluating soil quality in agricultural areas. From this perspective, Quick Diagnosis of Soil Structure (DRES) shows up as an efficient soil structure assessment in field. It was first developed to no-tillage crop systems but it may be well fit to others productive systems such as pasturelands. Brazilian cattle herd is one of the largest in the world, occupying around 159 million hectares. However, about 50% of this area is estimated being under some degradation level. Hence, strategies to pasture recovery demand previous diagnosis to stablish appropriated rehabilitation technics and pasture management. This work intends to distinguish pastures degradation...
Tipo: Anais e Proceedings de eventos Palavras-chave: Estrutura do Solo; Degradação Ambiental; Pastagem; Soil structure; Pastures; Degradation.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1115041
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Carbon in aggregate size classes in a Rhodic Eutrudox under different cropping systems. Repositório Alice
MACHADO, W.; MELO, T. R. de; FIGUEIREDO, A.; SANTOS, J. V. F. dos; LUCCAS, F. G.; FRANCHINI, J. C.; GUIMARÃES, M. de F.; TAVARES FILHO, J..
Título em português: Carbono em classes de agregados em um Latossolo Vermelho sob diferentes sistemas de cultura.
Tipo: Artigo de periódico Palavras-chave: Sistema de Cultivo; Sistema de Produção; Latossolo Vermelho; Cropping systems; Soil structure; Eutrudox.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1110674
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Changes in a Rhodic Hapludox under no-tillage and urban waste compost in the northwest of Rio Grande do Sul, Brazil Rev. Bras. Ciênc. Solo
Moraes,Moacir Tuzzin de; Silva,Vanderlei Rodrigues da; Cherubin,Maurício Roberto; Carlesso,Reimar; Debiasi,Henrique; Levien,Renato.
The use of urban waste compost as nutrient source in agriculture has been a subject of investigation in Brazil and elsewhere, although the effects on soil physical and chemical properties and processes are still poorly known. The aim of this study was to evaluate the effect of application of urban waste compost and mineral fertilizer on soil aggregate stability and organic carbon and total nitrogen content of a Rhodic Hapludox under no-tillage in the northwestern region of Rio Grande do Sul, Brazil, in the 2009/2010 and 2010/2011 growing seasons. The experiment was arranged in a 2 × 6 (seasons and fertilization) factorial in a randomized complete block design with four replications. The factor time consisted of two growing seasons (sunflower in 2009/10 and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil organic carbon; Aggregate stability; Total nitrogen; Soil structure; Organic manure.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400028
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Chemical migration during soil water retention curve evaluation Anais da ABC (AABC)
Pires,Luiz F.; Villanueva,Felipe C.A.; Dias,Nivea M.P.; Bacchi,Osny O. Santos; Reichardt,Klaus.
Wetting and drying (W-D) cycles can induce important elemental migrations in soils. The main purpose of this work was to study the possible existence of soil chemical elemental migrations in samples submitted to repeated W-D cycles during evaluations of soil water retention curve (SWRC). The experimental measurements were carried out by Atomic Absorption Spectrometry (AAS) for Ca2+, Mg2+ and K+ on samples of three different Brazilian tropical soils (Geric Ferralsol, Eutric Nitosol and Rhodic Ferralsol). Results demonstrate an increase in the electrical conductivity of the water extracted from the samples and significant losses of Ca2+, Mg2+ and K+ during the applications of up to nine W-D cycles. It was also observed differences in SWRC for all soils when...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Analytical methods; Soil structure; Wetting-drying cycles; Soil physics.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300028
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Corn root and soil health indicator response to no-till production practices. Repositório Alice
NUNES, M. R.; KARLEN, D. L.; DENARDIN, J. E.; CAMBARDELLA, C. A..
Tipo: Artigo de periódico Palavras-chave: Compactação do Solo; Estrutura do Solo; Carbono; Conservação do Solo; Soil compaction; Root growth; Soil structure; Soil organic carbon; Soil quality.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1115713
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Correção do solo, adubação e plantio. Infoteca-e
BERNARDI, A. C. de C.; MOREIRA, A.; FERREIRA, R. de P..
bitstream/item/220864/1/p-60-alfafa.pdf
Tipo: Capítulo em livro técnico (INFOTECA-E) Palavras-chave: Conservação do Solo; Estrutura do Solo; Adubação; Plantio; Soil conservation; Soil conditioners; Soil structure.
Ano: 2020 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1129761
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Diagnóstico rápido da estrutura do solo (DRES). Infoteca-e
RALISCH, R.; DEBIASI, H.; FRANCHINI, J. C.; TOMAZI, M.; HERNANI, L. C.; MELO, A. da S.; SANTI, A.; MARTINS, A. L. da S.; DE BONA, F. D..
A estrutura do solo é a forma como as partículas minerais (areia, silte e argila) e orgânicas do solo estão organizadas no espaço (Dexter, 1988). A estrutura também se refere ao padrão de arranjo das partículas primárias em unidades estruturais, os agregados, os quais são separados entre si por superfícies de fraqueza, ou apenas superpostos e sem conformação definida (Santos et al., 2013). A estrutura é um dos principais componentes da fertilidade do solo, refletindo, de forma imediata, os efeitos do manejo ao qual esse recurso é submetido. Avaliada nas camadas superficiais, proporciona indicações sobre a interação soloatmosfera. Métodos visuais objetivos e reprodutíveis de diagnóstico da qualidade estrutural do solo com base em medições de campo têm sido...
Tipo: Capítulo em livro técnico (INFOTECA-E) Palavras-chave: DRES; Estrutura do solo; Fertilidade do solo; Soil structure; Soil fertility.
Ano: 2017 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1107195
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Diagnóstico rápido da estrutura do solo (DRES) em áreas sob sistema plantio direto, integração lavoura-pecuária e sistema convencional. Repositório Alice
NUNES, A. L. P.; SILVA, A. P. da; SORIANI, R.; DEBIASI, H.; NOGUEIRA, M. A.; RALISCH, R..
Editores Técnicos: Marie Luise Carolina Bartz, Rafael Fuentes Llanilo, Ricardo Ralisch.
Tipo: Separatas Palavras-chave: Estrutura do Solo; Compactação do Solo; Soil compaction; Soil structure.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1103814
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Duração das alteraçoes em propriedades físico-hídricas de Latossolo argiloso decorrentes da escarificação mecânica. Repositório Alice
DRESCHER, M. S.; REINERT, D. J.; DENARDIN, J. E.; GUBIANI, P. I.; FAGANELLO, A.; DRESCHER, G. L..
O objetivo deste trabalho foi determinar o tempo de duração do efeito da descompactação do solo, por escarificação mecânica, por meio de indicadores físico‑hídricos de Latossolo argiloso, manejado em sistema plantio direto (SPD). Os tratamentos consistiram em meses (0, 6, 12, 18, 24, 30 e 36) transcorridos após escarificação mecânica em SPD e em testemunha sem escarificação em SPD há 27 anos. Foram avaliadas as variáveis: resistência mecânica à penetração, taxa de infiltração de água no solo, densidade e densidade relativa do solo, distribuição do tamanho de poros e condutividade hidráulica do solo saturado. A duração dos efeitos da escarificação mecânica variou com a propriedade do solo, tendo se mantido por 6 meses na densidade e na densidade...
Tipo: Artigo de periódico Palavras-chave: Compactação; Descompactação mecânica; Mechanical decompaction; Prensagem; Estrutura do solo; Manejo do solo; Soil compaction; Soil structure; Soil management.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1042287
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EFFECT OF BULK DENSITY ON HYDRAULIC PROPERTIES OF HOMOGENIZED AND STRUCTURED SOILS R.C. Suelo Nutr. Veg.
Dec,Dorota; Dorner,José; Becker-Fazekas,Orsolya; Horn,Rainer.
In order to determine the effect of bulk density and soil structure on their hydraulic behaviour, undisturbed samples were collected and disturbed samples were prepared from a Luvisol. The experimental field, located in Harste/Goettingen, Germany, was cultivated with sugar beet (Beta vulgaris). The water retention curve (WRC) and saturated hydraulic conductivity (Ks) were measured on undisturbed samples and homogenized samples prepared at different bulk densities (1.2 -1.4 and 1.6 Mg m-3). To determine the effect of soil shrinkage on the unsaturated hydraulic conductivity (k/Ψ) ,the vertical deformation of the repacked samples was measured and relative water content differences (dθ)were determined. The hydraulic properties of soils with...
Tipo: Journal article Palavras-chave: Water retention curve; Soil shrinkage; Soil structure.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912008000100001
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Effects of different management systems on porosity of oxisols in Paraná, Brazil Rev. Bras. Ciênc. Solo
Tavares Filho,João; Tessier,Daniel.
Soils play a fundamental role in the production of human foods. The Oxisols in the state of Paraná are among the richest and most productive soils in Brazil, but degradation and low porosity are frequently documented, due to intensive farming involving various management strategies and the application of high-tech solutions. This study aims to investigate changes in the porosity of two Red Oxisols (Latossolos Vermelhos), denoted LVef (eutroferric) and LVdf (dystroferric) under conventional and no-tillage soil management, with a succession of annual crops of soybean, maize and wheat over a continuous period of more than 20 years. After describing the soil profiles under native forest, no-tillage management and conventional tillage using the crop profile...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil structure; Crop profile method; No-tillage; Conventional tillage.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300031
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Effects of land use conversion on soil aggregate stability and organic carbon in different soils Agrociencia
Ćirić,Vladimir; Manojlović,Maja; Belić,Milivoj; Nešić,Ljiljana; Šeremešić,Srdan.
Aggregate stability is an important factor of the soil functioning. Greater aggregate stability leads to greater soil organic carbon (SOC) preservation, while SOC acts as a key cementing agent in aggregation processes. The objective of this study was to investigate the effects of native vegetation conversion in soil aggregate stability and SOC concentration. The investigation was conducted in the Vojvodina Province, Serbia, in July 2009. Undisturbed soil samples were taken from Haplic Chernozem, Haplic Fluvisol and Gleyic Vertisol, at a depth ranging from 0 to 20 cm. A completely randomized experimental design was used with three replicates. Each soil type was considered under treatments 1) cropland >100 years, 2) native meadow and 3) native...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aggregate stability; Soil organic carbon; Land use change; Soil type; Soil structure.
Ano: 2013 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952013000600002
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Evaluation of soil structure using participatory methods in the semiarid region of Brazil Rev. Ciênc. Agron.
Araújo,Ana Leônia de; Oliveira,Renato Teixeira de; Ferreira,Tiago Osório; Romero,Ricardo Espíndola; Oliveira,Teógenes Senna de.
Conservation practices are important in improving the environmental protection of agroecosystems in semiarid regions, as these are considered to be fragile environments. Soil-quality indicators are useful elements in evaluating the impact of some agricultural management practices, and the use of recognized indicators which are able to be measured by farmers is an innovative approach that seeks to integrate both scientific and local knowledge. This study aimed to evaluate the impact of various management practices through indicators of soil quality related to soil structure, in areas of family farming where agroecological consortiums are employed. These indicators were identified as important by the farmers themselves, and methodologies were suggested for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil structure; Soils - management; Family farm.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000300001
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Fast immersion to test the stability of aggregates in water: consequences for interpreting results from tropical soil classes Agronomy
Silva, Rodrigo Fonseca da; Cipriano, Patriciani Estela; Siueia Junior, Matias; Mars, Geslin; Dias Junior, Moacir de Souza.
Aggregates are the primary structural components of soil and have been used as an indicator of soil quality in conservation systems. The objective of this study was to analyse the effect of slow pre-wetting on the results of the aggregate stability test for different classes of tropical soils. Data were arranged in a 2 x 4 factorial design with three replications, in which the first factor comprised the two methods of pre-treatment on soil aggregates: without pre-wetting (WOPW), which considered the moisture of the aggregates in the field, and with pre-wetting (WPW), which considered the slow wetting of aggregates through capillarity on wet filter paper for 24h. The second factor consisted of four soil classes: Typic Dystrustept (Cambissolo Aplico...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil structure; Environmental quality; Geometric mean diameter..
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42453
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Indicadores físicos de un suelo bajo labranza de conservación y su relación con el rendimiento de tres cultivos. Colegio de Postgraduados
Navarro Bravo, Agustín.
El manejo físico o laboreo del suelo se hace para crear condiciones óptimas en la zona de raíces de las plantas, a través de una adecuada estructura, porosidad, infiltración y retención de agua, entre otras, que son importantes para el manejo sustentable del recurso suelo. Para la identificación de indicadores físicos del suelo para la producción de cultivos, se utilizaron técnicas tradicionales y no destructivas de análisis tales como: la reflectometría de dominio del tiempo (TDR) y el penetrómetro de ultrasonido (PU) que garantizan la medición rápida de algunas propiedades físicas del suelo. Bajo este enfoque, se evaluó un agroecosistema de haba-maíz-frijol en rotación manejado con labranza de conservación, en el Colegio de Postgraduados, Montecillo,...
Palavras-chave: Estructura del suelo; Rendimiento de grano; Sostenibilidad; Grain yield; Soil structure; Sustainability; Doctorado; Edafología.
Ano: 2010 URL: http://hdl.handle.net/10521/60
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