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Registros recuperados: 24
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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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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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Aggregation of subtropical soil under liming: a study using laser diffraction Rev. Bras. Ciênc. Solo
Bortoluzzi,Edson Campanhola; Poleto,Cristiano; Baginski,Álvaro José; Silva,Vanderlei Rodrigues da.
Laser diffraction (LD) provides detailed analysis of particle size distribution. Its application to testing the stability of soil aggregates can assist studies on the aggregation of soils with contrasting electrochemical properties. The objectives of the present work were: (a) to propose a protocol for using LD to study soil aggregation, (b) to study the aggregation of an Acrisol under the influence of different doses and forms of lime. Samples were collected in 2005 from a Brazilian Acrisol that in 1994 had received 0.0; 2.0; 8.5 and 17.0 Mg ha-1 of lime, left on the soil surface or incorporated. Aggregates from 4.76 to 8.00 mm diameters were studied using the traditional method proposed by Kemper & Chepil (1965), with wet sieving, while...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Laser granulometry; Aggregate stability; Particle cohesion.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300014
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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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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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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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Estimativa da erodibilidade pela desagregação por ultra-som e atributos de solos com horizonte B textural. Repositório Alice
SÁ, M.A.C. de; LIMA, J.M. de; CURI, N.; MASSAROTO, J.A.; SÁ, J.J.G. de; MARQUES, M..
A erodibilidade de solos é um fator importante na estimativa das perdas por erosão. Este fator é uma expressão da combinação de atributos do solo, os quais possibilitam sua estimativa por meio de equações. O objetivo deste trabalho foi medir atributos químicos e mineralógicos que, combinados com índices de estabilidade de agregados determinados por ultra-som, pudessem ser utilizados como variáveis em modelos na estimativa da erodibilidade de solos com horizonte B textural do Brasil. Estes atributos foram determinados em 22 solos de erodibilidade conhecida, medida diretamente em parcelas no campo. Atributos de 21 dos solos foram utilizados no ajuste dos modelos. Um dos solos (Argissolo Vermelho-Amarelo) foi escolhido ao acaso para teste. De 96 variáveis, 15...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: USLE; Estabilidade de agregados; Química; Mineralogia; Aggregate stability; Chemistry; Mineralogy.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/112197
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Humic Haplustox under different land uses in a high altitude environment in the Agreste region of Pernambuco, Brazil Rev. Bras. Ciênc. Solo
Araujo,Jane Kelly Silva; Ribeiro,Mateus Rosas; Corrêa,Marcelo Metri; Galindo,Izabel Cristina de Luna; Souza Júnior,Valdomiro Severino de.
The Garanhuns Plateau in the Agreste region of the State of Pernambuco, Brazil is characterized by humid climatic conditions due to orographic rains, unlike the surrounding semiarid region. These soils are subjected to intense agricultural use and are extremely important for the regional economy. This study was carried out in the municipality of Brejão in the Agreste region with the aim of assessing changes in humic Haplustox soils subjected to different land uses. Four plots with different vegetation covers (native forest, secondary shrubby vegetation (capoeira), traditional cropping system, and planted pasture) were selected, and samples were taken from a soil profile and four small pits surrounding it at each site. Physical and chemical properties were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Land use; Highland soils; Humic substances; Aggregate stability; Microbial biomass C.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400029
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Influence of field slope and coffee plantation age on the physical properties of a red-yellow Latosol Rev. Bras. Ciênc. Solo
Iori,Piero; Dias Junior,Moacir de Souza; Ajayi,Ayodele Ebenezer; Guimarães,Paulo Tácito Gontijo; Abreu Júnior,Áureo Aparecido.
In modern agriculture, several factors cause changes in the soil physical properties. The time of establishment of a crop (plantation age) and the slope are examples of factors that moderate the impact of mechanized operations on the soil structure. The objective of this study was to analyze the effect of machinery traffic on the physical properties of a Red-Yellow Latosol under coffee plantations with different ages (2, 7, 18, and 33 years) and slope positions (3, 9 and 15 %). Samples were collected from three positions between coffee rows (lower wheel track, inter-row and upper wheel track) and at two depths (surface layer and sub-surface). Changes in the total porosity, macroporosity, microporosity, organic matter, bulk density, and aggregate stability...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural traffic; Coffea arabica L.; Soil degradation; Aggregate stability.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100010
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Organic Carbon and Physical Properties in Sandy Soil after Conversion from Degraded Pasture to Eucalyptus in the Brazilian Cerrado Rev. Bras. Ciênc. Solo
Sena,Karla Nascimento; Maltoni,Kátia Luciene; Faria,Glaucia Amorim; Cassiolato,Ana Maria Rodrigues.
ABSTRACT Soil is currently seen as the most relevant carbon sink and the most effective carbon stabilizer. In contrast, agriculture is the second largest C emitter, after burning of fossil fuels. This organic carbon (OC) introduced into the soil, mainly via organic matter (OM), is essential for several soil properties and plays an extremely important role in sandy soils. The objective of this study was to describe the changes in the amounts and pools of OC and the influence thereof on some physical soil properties in areas converted from pasture to eucalyptus. The following areas were analyzed: a degraded pasture (PAST), two areas of pasture-eucalyptus conversion after 2 and 15 years (EU02 and EU15, respectively) and a preserved Cerrado area (CER) in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aggregate stability; Carbon pool; Oxisols; Anthropogenic soils.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100518
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Physical attributes of ultisol of Brazil's Northeastern semiarid under organic farming of wine grapes. Repositório Alice
FEITOZA, J. R.; MENDES, A. M. S.; OLSZEVSKI, N.; CUNHA, T. J. F.; CORTEZ, J. W.; GIONGO, V..
The purpose of this study was to evaluate the effects of organic farming of wine grapes under physical and chemical characteristics of Ultisol Brazil?s northeastern semiarid region. The samples of soil were collected from the row and interrow of the farming and from the fallow area, at the depths of 0.0-0.10, 0.10- 0.20, 0.20-0.30 and 0.30-0.60 m. The samples were collected at six and twelve months after the culture implementation to evaluate the state of aggregation, bulk density and total soil porosity, flocculation index and organic matter contents, calcium, magnesium, and sodium. The results were submitted to statistical analysis. The adoption of organic farming contributed to the soil aggregation process. The bulk density and total soil porosity did...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Agricultura biológica; Qualidade do solo; Uvas para vinho; Argissolo; Vitivinicultura; Uva; Solo; Aggregate stability; Organic farming; Soil quality; Vitiviniculture.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1012104
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Physical attributes of ultisol of Brazil's northeastern semiarid under organic farming of wine grapes Anais da ABC (AABC)
Feitosa,Jardenia R.; Mendes,Alessandra M.S.; Olszevski,Nelci; Cunha,Tony J.F.; Cortez,Jorge W.; Giongo,Vanderlise.
The purpose of this study was to evaluate the effects of organic farming of wine grapes under physical and chemical characteristics of Ultisol Brazil's northeastern semiarid region. The samples of soil were collected from the row and interrow of the farming and from the fallow area, at the depths of 0.0-0.10, 0.10-0.20, 0.20-0.30 and 0.30-0.60 m. The samples were collected at six and twelve months after the culture implementation to evaluate the state of aggregation, bulk density and total soil porosity, flocculation index and organic matter contents, calcium, magnesium, and sodium. The results were submitted to statistical analysis. The adoption of organic farming contributed to the soil aggregation process. The bulk density and total soil porosity did...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aggregate stability; Organic farming; Soil quality; Vitiviniculture.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100483
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Physical properties and particle-size fractions of soil organic matter in crop-livestock integration Rev. Bras. Ciênc. Solo
Tirloni,Carolina; Vitorino,Antonio Carlos Tadeu; Bergamin,Anderson Cristian; Souza,Luiz Carlos Ferreira de.
Crop-livestock integration represents an interesting alternative of soil management, especially in regions where the maintenance of cover crops in no-tillage systems is difficult. The objective of this study was to evaluate soil physical and chemical properties, based on the hypothesis that a well-managed crop-livestock integration system improves the soil quality and stabilizes the system. The experiment was set up in a completely randomized design, with five replications. The treatments were arranged in a 6 x 4 factorial design, to assess five crop rotation systems in crop-livestock integration, and native forest as reference of soil undisturbed by agriculture, in four layers (0.0-0.05; 0.05-0.10; 0.10-0.15 and 0.15-0.20 m). The crop rotation systems in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crop rotation; No-tillage system; Soil quality; Soil carbon; Aggregate stability.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000400024
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Qualidade física de solos influenciada pelo uso e manejo na região de Guaraí-TO. Infoteca-e
FILIZOLA, H. F.; FONTANA, A.; DONAGEMMA, G. K.; SOUZA, M. D. de; BORTOLON, E. S. O.; BORTOLON, L..
Resumo: As terras onde predominam solos arenosos distribuem-se em extensas áreas em todas as regiões do Brasil, sendo muito utilizadas em áreas de intensificação da agricultura. O uso desses solos nos sistemas agrícolas tem efeito sobre suas características e atributos. Com o objetivo de avaliar as consequências desse uso sobre algumas das suas propriedades físicas foi selecionada uma área localizada em uma propriedade agrícola no município de Guaraí (TO). Em amostras de solos coletadas em 18 trincheiras foram avaliadas a textura, a estabilidade dos agregados, o grau de floculação das argilas, a porosidade, a densidade, a condutividade hidráulica saturada (K s ), a infiltração e a retenção da água no solo. Os solos avaliados não apresentam nenhum dos...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Solo arenoso; Física do solo; Uso da terra; Textura do solo; Condutividade hidráulica; Porosidade; Retenção de água no solo; Sandy soils; Soil physical properties; Aggregate stability; Soil texture; Soil density; Hydraulic conductivity; Soil water retention; Soil permeability.
Ano: 2017 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1081400
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Qualidade física de solos influenciada pelo uso e manejo na região de Guaraí-TO. Infoteca-e
FILIZOLA, H. F.; FONTANA, A.; DONAGEMMA, G. K.; SOUZA, M. D. de; BORTOLON, E. S. O.; BORTOLON, L..
Resumo: As terras onde predominam solos arenosos distribuem-se em extensas áreas em todas as regiões do Brasil, sendo muito utilizadas em áreas de intensificação da agricultura. O uso desses solos nos sistemas agrícolas tem efeito sobre suas características e atributos. Com o objetivo de avaliar as consequências desse uso sobre algumas das suas propriedades físicas foi selecionada uma área localizada em uma propriedade agrícola no município de Guaraí (TO). Em amostras de solos coletadas em 18 trincheiras foram avaliadas a textura, a estabilidade dos agregados, o grau de floculação das argilas, a porosidade, a densidade, a condutividade hidráulica saturada (K s ), a infiltração e a retenção da água no solo. Os solos avaliados não apresentam nenhum dos...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Solo arenoso; Física do solo; Uso da terra; Textura do solo; Condutividade hidráulica; Porosidade; Retenção de água no solo; Sandy soils; Soil physical properties; Aggregate stability; Soil texture; Soil density; Hydraulic conductivity; Soil water retention; Soil permeability.
Ano: 2017 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1075224
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RECOVERY OF AN OXISOL DEGRADED BY THE CONSTRUCTION OF A HYDROELECTRIC POWER PLANT Rev. Bras. Ciênc. Solo
Carvalho,Joseane Carina Borges de; Espindola,Carlos Roberto; Alves,Marlene Cristina; Figueiredo,Getulio Coutinho; Dechen,Sonia Carmela Falci.
ABSTRACT The removal of thick layers of soil under native scrubland (Cerrado) on the right bank of the Paraná River in Selvíria (State of Mato Grosso do Sul, Brazil) for construction of the Ilha Solteira Hydroelectric Power Plant caused environmental damage, affecting the revegetation process of the stripped soil. Over the years, various kinds of land use and management systems have been tried, and the aim of this study was to assess the effects of these attempts to restore the structural quality of the soil. The experiment was conducted considering five treatments and thirty replications. The following treatments were applied: stripped soil without anthropic intervention and total absence of plant cover; stripped soil treated with sewage sludge and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aggregate stability; Soil compaction; Stripped soil; Soil quality.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601776
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Sistemas de colheita e manejo da palhada de cana-de-açúcar. Repositório Alice
SOUZA, Z.M. de; PRADO, R.M.; PAIXÃO, A.C.S.; CESARIN, L.G..
A colheita com cana crua está cada vez mais presente no sistema de produção da cana-de-açúcar no Brasil. O objetivo deste trabalho foi avaliar o efeito de sistemas de colheita e manejo da cana crua com e sem incorporação da palhada e cana queimada nos atributos físicos do solo e na produção de colmos em cana-de-açúcar cultivada em um Latossolo Vermelho-Amarelo distrófico. Os tratamentos foram cana-de-açúcar com queima e corte manual; cana-de-açúcar sem queima e corte mecanizado, com incorporação da palha triturada até 0,30 m; e cana-de-açúcar sem queima e corte mecanizado, sem incorporação da palha triturada. Foram determinadas a composição granulométrica, matéria orgânica, estabilidade de agregados, densidade e porosidade do solo nas profundidades de...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Saccharum officinarum; Queima da palhada; Estabilidade de agregados; Densidade do solo; Resistência do solo à penetração; Residue burning; Aggregate stability; Bulk density; Soil resistance to penetration.
Ano: 2005 URL: http://www.alice.cnptia.embrapa.br/handle/doc/113880
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Soil chemical management drives structural degradation of Oxisols under a no-till cropping system. Repositório Alice
NUNES, M. R.; SILVA, A. P.; DENARDIN, J. E.; GIAROLA, N. F. B.; VAZ, C. M. P.; van ES, H. M.; SILVA, A. R..
bitstream/item/179426/1/P-Soil-Chemical-soil-research....pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Clay dispersion; Organic carbon; Aggregate stability; Soil conservation.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1082033
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Soil physical attributes in forms of sowing the annual winter pasture and intervals between grazing Rev. Ciênc. Agron.
Veiga,Milton da; Balbinot Junior,Alvadi Antonio; Oliveira,Daniela Aparecida de.
The sowing of winter pastures in areas used for summer grain production and their management under direct cattle grazing can cause changes in soil physical attributes, whose intensity depends on the degree of soil mobilization, grazing interval, stocking rate and weather. To study these aspects it was conducted over four years an experiment in a randomized block with split plots design and four replications. In the main plots were applied two forms of sowing the annual winter pasture (direct seeding and seeding + harrowing) and, in the subplots, four intervals between grazing (7, 14 and 28 days and ungrazed). Undisturbed soil cores were sampled at the end of each grazing cycle, in the 0-0.05 m layer to determine the saturated hydraulic conductivity and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crop-livestock integration system; Bulk density; Porosity; Saturated hydraulic conductivity; Aggregate stability.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500005
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SOIL QUALITY IN RELATION TO FOREST CONVERSION TO PERENNIAL OR ANNUAL CROPPING IN SOUTHERN BRAZIL Rev. Bras. Ciênc. Solo
Balota,Elcio Liborio; Yada,Ines Fumiko Ubukata; Amaral,Higo Furlan; Nakatani,Andre Shigueyoshi; Hungria,Mariangela; Dick,Richard Peter; Coyne,Mark Steven.
Many forested areas have been converted to intensive agricultural use to satisfy food, fiber, and forage production for a growing world population. There is great interest in evaluating forest conversion to cultivated land because this conversion adversely affects several soil properties. We examined soil microbial, physical, and chemical properties in an Oxisol (Latossolo Vermelho distrófico) of southern Brazil 24 years after forest conversion to a perennial crop with coffee or annual grain crops (maize and soybeans) in conventional tillage or no-tillage. One goal was to determine which soil quality parameters seemed most sensitive to change. A second goal was to test the hypothesis that no-tillage optimized preservation of soil quality indicators in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Land use; Tillage; Coffee; Biological activity; Potential mineralization; Aggregate stability.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000401003
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