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| Frantz,Ulisses G.; Schlosser,José F.; Rodrigues,Fabrício A.; Farias,Marcelo S. de; Barbieri,Juan P.. |
| RESUMO Na semeadura do arroz irrigado, é necessária a boa drenagem da área, sendo realizados drenos cortando as taipas transversalmente. Para o estabelecimento da lâmina de irrigação definitiva, é necessário o fechamento destes drenos realizado pelos agricultores por meio de diversas maneiras. O estudo de tempos e movimentos de diferentes operações agrícolas é uma importante ferramenta para a obtenção de dados que reflitam o desempenho das mesmas. Dessa forma, o presente trabalho objetivou avaliar o desempenho de cinco equipamentos utilizados na lavoura orizícola, na operação de fechamento de taipas abertas para drenagem (entaipadora de base larga, braço valetador, caçamba "scraper", pá de corte e um protótipo desenvolvido para realizar esta operação), em... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drenos; Lavoura orizícola; Eficiência. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000500875 |
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| Farias,Marcelo S. de; Dagios,Ravel F.; Santi,Antônio L.; Cherubin,Maurício R.. |
| ABSTRACT The automatic control of section shut-off in seed drills minimizes seeding overlap and can reduce productivity losses, especially in responsive crops such as corn. In that context, this study evaluated the effect of sowing overlap on the grain yield and productivity of three corn hybrids. A DB-50 precision seed drill, with 33 rows equipped with a 16-row automatic section control, was used in this experiment. A randomized block design was applied to test three corn hybrids under two sowing conditions (without sowing overlap - WOSO; and with sowing overlap - WSO), with four replications. The analyzed variables were the number of plants per hectare, the number of cobs per hectare, cob length, the number of grains per cob, the thousand grain weight,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Precision agriculture; Section control; Plant population. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000400489 |
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| Farias,Marcelo S. de; Schlosser,José F.; Linares,Pilar; Bertollo,Gilvan M.; Martini,Alfran T.. |
| ABSTRACT During the acquisition and use of an agricultural tractor, the consumption of fuel by the engine must be taken into account by the user, considering its nonrenewable origin and the marketing price. Appropriate strategies in driving tractors can help users to reduce production costs. In this context, the objective of this study was to evaluate the fuel consumption of an agricultural tractor using different driving strategies. Load levels were imposed, following the instructions from Organization for Economic Co-operation and Development Code 2, using an instrumented dynamometer car, in a concrete test track. Six load levels (30, 40, 50, 60, 70, and 80% of Q0) and three travel speeds (5.16, 7.29, and 10.48 km h-1) were applied for the strategies... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Concrete test track; Load levels; Energy efficiency. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000200144 |
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