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| Mazurana,Michael; Levien,Renato; Zulpo,Lucas; Passos,Gabrielle M.; Kerpen,Hyran S.. |
| ABSTRACT: The loading application time by machinery tires and agricultural tires is one of the factors of soil compaction. We evaluated the effect of loading reduction time in uniaxial compression test, in laboratory, in some physical and mechanical parameters, approaching the loading field condition time by machinery with laboratory tests. Soil samples of two Oxisol and one Paleudult under different years of implementation of no tillage system (NT) and of different layers were collected and subjected to uniaxial compression tests, two times of loading application, 300 seconds per load, according to actual methodology and 30 seconds per load in the laboratory. We analyzed the soil deformation to each load, bulk density, pre-compression stress, recompress... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Loading bearing support; Compaction; Recompression index. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000500973 |
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| Zulpo,Lucas; Kerpen,Hyran Stefanowski; Fink,Jefferson Antonio; Mazurana,Michael; Levien,Renato. |
| Abstract: The objective of this work was to evaluate the impact of different furrow-opening mechanisms on soil physical characteristics, such as mobilization, porosity, bulk density, and the dynamics of water content and temperature in the sowing groove, as well as the influence of wheeled traffic and of these variables on corn (Zea mays) productivity. The experiment was conducted at the agronomic experimental station of Universidade Federal do Rio Grande do Sul on a Argissolo Vermelho (red Ultisol). Treatments consisted of three winter cover crops and of two types of furrow-opening mechanisms for fertilization (shank and disk), with or without tractor traffic. Corn was planted as the summer crop, and soil mobilization in the sowing groove, soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; No-tillage system; Furrow-opening mechanisms; Soil compaction; Soil temperature. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000103804 |
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| Mazurana,Michael; Fink,Jessé Rodrigo; Silveira,Victor Hugo da; Levien,Renato; Zulpo,Lucas; Brezolin,Darlan. |
| O desempenho das funções do solo pode ser influenciado pela compactação imposta pelo manejo inadequado. Algumas propriedades físicas do solo são tomados como indicadores da presença de camadas compactadas, as quais podem interferir no desenvolvimento radicular de culturas. Práticas agrícolas, como o uso de plantas de cobertura, que melhoram as propriedades do solo, podem mitigar problemas relacionados à compactação. O objetivo deste trabalho foi avaliar propriedades físicas de solo e de plantas, estas cultivadas em condições controladas. Em um Argissolo Vermelho sob sistema plantio direto consolidado com dois manejos de cobertura de inverno (pousio e aveia + ervilhaca) e tráfego controlado de máquinas [sem tráfego (ST), antes do tráfego (AT) e depois do... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Resistência à penetração; Densidade do solo; Capacidade de suporte de carga; Massa de raízes. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500008 |
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| Santos,Caroline Valverde dos; Levien,Renato; Schwarz,Sérgio Francisco; Mazurana,Michael; Petry,Henrique Belmonte; Zulpo,Lucas; Fink,Jefferson Antônio. |
| Citrus plants are the most important fruit species in the world, with emphasis to oranges, mandarins and lemons. In Rio Grande do Sul, Brazil, most fruit production is found on small properties under organic cultivation. Soil compaction is one of the factors limiting production and due to the fixed row placement of this crop, compaction can arise in various manners in the interrows of the orchard. The aim of this study was to evaluate soil physical properties and water infiltration capacity in response to interrow management in an orchard of mandarin (Citrus deliciosa Tenore 'Montenegrina') under organic cultivation. Interrow management was performed through harrowing, logs in em "V", mowing, and cutting/knocking down plants with a knife roller. Soil... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Citrus production; Farm equipment; Organic growing. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000600023 |
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