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| BRANDELERO,EVANDRO M.; ARAÚJO,AUGUSTO G. DE; RALISCH,RICARDO. |
| Straw on sowing line modifies seed germination environment regarding temperature and water content. Given these considerations, the aim of this study was to evaluate different mechanisms for coverage mobilization on the sowing line and their effect on germination environment of maize seeds, mainly in relation to the dynamics of straw in the seedbed, water content and soil temperature. Treatments consisted on the combination of two mechanisms at front of furrow opener, composed of cutting disc and row cleaners, with three mechanisms behind the seed furrower for returning the soil, consisting of three covering mechanisms, commercial and prototype models. It was found that straw presence on the surface of sowing line contributed to germination of maize seeds,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: No-tillage planting; Germination environment; Furrowers; Soil coverage. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000100098 |
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| BRANDELERO,EVANDRO M.; ARAÚJO,AUGUSTO G. DE; RALISCH,RICARDO. |
| Vegetation cover on soil acts positively in maintaining temperature and soil moisture, yet, it has been imposing specific operational conditions on seeders. The objective of this study was to evaluate performance of different mechanisms regarding straw mobilization, employed in a no-till seeder. The experimental area was conducted on clayey soil under no-tillage with a large quantity of sorghum residue. The experiment was established in a randomized block design, as the treatments consisted of a combination of two mechanisms at front of the furrow opener composed of cutting disc and row cleaners, and three mechanisms behind the seed furrower, covering discs prototype model M1, Spider and commercial model, with the combination of cutting disc and Spider... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Seeder; Furrowers. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000100089 |
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| JUNIOR,RUY CASÃO; ARAÚJO,AUGUSTO GUILHERME DE; RALISCH,RICARDO. |
| O sistema de plantio direto atingiu, no Estado do Paraná, cerca de dois milhões de hectares, nos últimos anos, e um dos seus principais entraves é a falta de semeadoras-adubadoras apropriadas para operação em solos argilosos e de origem basáltica. Portanto, estudou-se a MAGNUM 2850 PD quanto à demanda energética e desempenho operacional, com a finalidade de oferecer subsídios ao seu aperfeiçoamento, de acordo com a realidade paranaense. Observou-se que o esforço de tração variou em função da umidade e características mecânicas do solo, atingiu valores elevados, e exigiu, em situações extremas, potência de até 79,5 kW do trator. Os componentes de ataque ao solo mostraram um bom desempenho no corte da vegetação e na uniformidade da profundidade de trabalho,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Força de tração; Distribuição de sementes; Distribuição de fertilizante. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000300007 |
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