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| Registros recuperados: 74 | |
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| Giarola, Neyde Fabíola Balarezo; UEPG; Brachtvogel, Elizeu Luiz; UNIOESTE; Fontaniva, Silvano; UNIOESTE; Pereira, Regina Alves; UNIOESTE; Fioreze, Samuel Luiz; UNIOESTE. |
| O processo de compactação pode modificar os atributos físicos do solo a ponto de limitar o potencial genético de desenvolvimento de culturas agrícolas ou de cultivares mais sensíveis. O objetivo deste trabalho foi avaliar, em Latossolo Vermelho Eutroférrico típico, a resposta de parâmetros de produção de cultivares de soja (Glycine Max L. Merrill) e atributos físicos do solo ao sistema plantio direto em condições de lavoura e com compactação adicional. O estudo foi conduzido na C-Vale Cooperativa Agroindustrial, em Palotina, Estado do Paraná. Foram avaliados dois tratamentos de solo: sistema plantio direto sem compactação adicional (SPD-C0) e sistema plantio direto com compactação adicional (PD-C1), e cinco cultivares de soja: (1) Coodetec 204, (2)... |
| Tipo: Pesquisa Empirica de Campo |
Palavras-chave: 5.01.03.04-0 Produção de Mudas densidade do solo; Porosidade do solo; Glycine max L. Merrill; Compactação do solo 5.01.01.06-4 bulk density; Soil porosity; Glycine max L. Merril; Soil compaction. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/851 |
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| Bianchini,Aloísio; Roque,Márcio W.; Rosa,Rodrigo P.. |
| The aim of this study was to develop a an automated bench top electronic penetrometer (ABEP) that allows performing tests with high rate of data acquisition (up to 19,600 Hz) and with variation of the displacement velocity and of the base area of cone penetration. The mechanical components of the ABEP are: a supporting structure, stepper motor, velocity reducer, double nut ball screw and six penetration probes. The electronic components of ABEP are: a "driver" to control rotation and displacement, power supply, three load cells, two software programs for running and storing data, and a data acquisition module. This penetrometer presented in compact size, portable and in 32 validation tests it proved easy to operate, and showed high resolution, high... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil compaction; Soil resistance to penetration; Velocity test; Cone index. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000600012 |
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| Fin,Silvana Spaniol; Marchesan,Enio; Gubiani,Paulo Ivonir; Farenzena,João Alberto Pedroso; Murari,Marcos Stefanello; Coelho,Lucas Lopes; Cargnelutti Filho,Alberto; Aramburu,Bruno Behenck. |
| Abstract: The objective of this work was to determine the duration of the effects of the mechanical interventions scarification and raised bed on soybean (Glycine max) grain yield on an Alfisol, as well as to evaluate, through physical indicators, if the use of cover plants during winter increases the duration of these effects. The experimental design was a complete randomized block with four replicates. Two factors were evaluated. The first consisted of types of soil preparation systems: SC14, scarification in November 2014; SC15, scarification in November 2015; RB14, raised bed built in November 2014; and RB15, raised bed built in November 2015. The second consisted of the type of cover crop used: winter fallow, oat, ryegrass, and wheat. From November... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Crop rotation; Rice areas; Soil compaction; Soil preparation. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001101230 |
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| Souza,Gustavo Soares de; Souza,Zigomar Menezes de; Silva,Reginaldo Barboza da; Barbosa,Ronny Sobreira; Araújo,Fernando Silva. |
| The cultivation of sugarcane with intensive use of machinery, especially for harvest, induces soil compaction, affecting the crop development. The control of agricultural traffic is an alternative of management in the sector, with a view to preserve the soil physical quality, resulting in increased sugarcane root growth, productivity and technological quality. The objective of this study was to evaluate the physical quality of an Oxisol with and without control traffic and the resulting effects on sugarcane root development, productivity and technological quality. The following managements were tested: no traffic control (NTC), traffic control consisting of an adjustment of the track width of the tractor and sugarcane trailer (TC1) and traffic control... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural mechanization; Soil compaction; Root system; Technological variables; Saccharum sp. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100013 |
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| Sato,Michel Keisuke; Lima,Herdjania Veras de; Ferreira,Raphael Leone da Cruz; Rodrigues,Sueli; Silva,Álvaro Pires da. |
| ABSTRACT In areas cultivated with oil palm, typically mechanized field operations using heavy vehicles may negatively affect soil physical properties and productivity. The aim of this study was to evaluate soil physical quality in an area cultivated with oil palm by monitoring the temporal variation of the soil water content and relating it to the critical limits of the least limiting water range. Soil bulk density (Bd), soil penetration resistance (SR), least limiting water range (LLWR), and water stress days (WSD) were used to assess soil physical quality in planting rows (PR) and the traffic zone (TZ) at depths 0-20, 20-40, and 40-60 cm. The Bd was higher and the LLWR was reduced in TZ only at the surface layer. The effect of temporal variation in soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Elaeis guineensis Jacq; Soil physical quality; Soil compaction; Water stress. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000200148 |
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| Bezerra,Raphaela R.; Silva,Ênio F. de F. e; Siqueira,Glécio M.; Dantas,Daniel da C.; Almeida,Brivaldo G. de; Silva,Alexsandro O. da. |
| ABSTRACT The impacts of agricultural mechanization and soil management on sugarcane activity may compromise the growth of plants. This study aimed to evaluate the initial growth of sugarcane (Saccharum officinarum) at soil densities under two salinity conditions, associated with the least limiting water range (LLWR), and obtain the critical density for the Spodosol. The treatments consisted of the use of five bulk densities (1.40; 1.50; 1.60; 1.70 and 1.80 Mg m-3) and two conditions of soil salinity (ECse = 0.5 and 3.0 dS m-1). Morphological variables and biomass of sugarcane plants were measured and, simultaneously, undisturbed soil samples were collected in the layers of 0.02-0.08 m to determine the water retention curve, soil resistance to penetration... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum officinarum; Soil compaction; Soil resistance to root penetration; Soil physical quality. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001100833 |
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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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| Varón-Ramírez,Viviana Marcela; Camacho-Tamayo,Jesús Hernán; González-Nivia,Janeth. |
| ABSTRACT The physical characteristics of the soil are defined through the interaction between its properties, and they, in turn, can indicate its physical quality. The study area is located in the Centro Agropecuário Marengo (Marengo Agricultural Center), with an extension of 94.5 ha, subdivided into 17 plots. The objective of this research was to study characteristics such as water storage capacity, structure, consistency, and soil compaction in the two surface horizons (H1 and H2), in order to define management zones through the soil index. Properties such as soil penetration resistance were an indicator of soil degradation, with values higher than 2 MPa in 13 plots. The total porosity exhibited medium or low values in the H1 and H2 horizons, with a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil degradation; Soil compaction; Soil water storage; Soil index.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000300248 |
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| Ortigara,Cícero; Moraes,Moacir Tuzzin de; Debiasi,Henrique; Silva,Vanderlei Rodrigues da; Franchini,Julio Cezar; Luz,Felipe Bonini da. |
| Estimation of soil load-bearing capacity from mathematical models that relate preconsolidation pressure (σp) to mechanical resistance to penetration (PR) and gravimetric soil water content (U) is important for defining strategies to prevent compaction of agricultural soils. Our objective was therefore to model the σp and compression index (CI) according to the PR (with an impact penetrometer in the field and a static penetrometer inserted at a constant rate in the laboratory) and U in a Rhodic Eutrudox. The experiment consisted of six treatments: no-tillage system (NT); NT with chiseling; and NT with additional compaction by combine traffic (passing 4, 8, 10, and 20 times). Soil bulk density, total porosity, PR (in field and laboratory measurements), U,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rhodic Eutrudox; No-tillage system; Machinery traffic; Soil compaction. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000401036 |
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| Ros,Vinicius de V; Souza,Cristiano M. A. de; Vitorino,Antonio C. T; Rafull,Leidy Z. L. |
| If inappropriately conducted, management and sowing practices may compromise the environment and the profitability of the agricultural activity. The aim of this study was to analyze the furrow opener mechanisms action and the level of load applied to soil firming mechanism in no-till, on the Oxisol resistance to penetration during soybean sowing, under three soil moistures. The experiment was arranged in split-split plot design, in which the plots were composed by three soil moistures (23.8; 25.5 and 27.5% b.s.), two furrow opener mechanisms sub-plots (double disks and furrow plough) and the split-split plot of three levels of load applied to soil firming mechanism (12.2; 18.5 and 24.1 kPa), according to randomized blocks design, with three replications.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Furrow opener mechanism; Soil firming mechanism; Soil compaction. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000600008 |
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| Giacomeli,Robson; Marchesan,Enio; Oliveira,Maurício Limberger de; Martin,Thomas Newton; Teló,Gustavo Mack; Donato,Gabriel; Silva,Marília Ferreira da. |
| ABSTRACT Rice monoculture in lowlands can cause problems for management practices in crop fields, for example, in weed control. For this reason, corn in rotation with irrigated rice in lowlands may be advantageous, despite problems with soil compaction and water excess. The objective of this study was to evaluate soil physical properties and corn performance in soil management systems in an Albaqualf soil (lowlands). Two experiments were conducted in the field, in the 2013/14 and 2014/15 crop seasons. The experimental design was randomized blocks with two factors. There were three levels for the first factor, consisting of soil management practices: soil chiseling 45 days before sowing to a depth of 0.3 m; conventional tillage with two diskings to a depth... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Soil compaction; Soil chiseling; No-till; Raised seedbed. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100408 |
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| Registros recuperados: 74 | |
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