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| Registros recuperados: 48 | |
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| 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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| 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: Parte de livro |
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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| 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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| 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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| 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,... |
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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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| 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,... |
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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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| 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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| Lima,Cláudia Liane Rodrigues de; Dupont,Patrícia Bianca; Pillon,Clenio Nailto; Miola,Ezequiel Cesar Carvalho. |
| ABSTRACT: Agricultural areas in the region of Turuçu, on the Southeast Hillside in the state of Rio Grande do Sul (RS), Brazil present many examples of soil physical degradation. Accordingly, strategies aimed at evaluating and ameliorating the structural quality of soils should be developed to ensure the sustainable use of these areas. This study aimed to evaluate the least limiting water range (LLWR), S-index, compressibility parameters, organic carbon and the organic matter granulometric fractions of a Udalf under different agricultural uses. Soil samples with disturbed and non-disturbed structure from the 0.00 to 0.10 m layer were collected on farms in the Southeast Hillside, Turuçu region, RS, for analyzing soil under: i) conventional system of corn... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil quality; Soil physics; Soil structure; Soil compaction. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000100100 |
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| Pais,Paula Sant'Anna Moreira; Dias Junior,Moacir de Souza; Dias,Adriana Cristina; Iori,Piero; Guimarães,Paulo Tácito Gontijo; Santos,Gislene Aparecida dos. |
| It is essential to know the levels of pressure applied to the soil by different weed managements to adapt the management of coffee plantations in a sustainable manner. The objectives of this study were: a) to generate load-bearing capacity models of a Red-Yellow Latosol (Oxisol) submitted to different weed managements and b) to determine which weed management resulted in higher compression. The study was conducted at the Experimental Farm of EPAMIG, located near the community Farias, in Lavras-MG (latitude 21° 14' 43" S and longitude 44° 59' 59" W and altitude of 919 m). The soil is a Red-Yellow Latosol (LVA) cultivated with coffee plantation using Topazio MG 1190 coffee variety, since 2006. We evaluated five weed managements, three being through... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffee culture; Soil compaction; Sustainability; Preconsolidation stress; Soil structure. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000200005 |
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| Registros recuperados: 48 | |
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