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| Registros recuperados: 26 | |
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| Camacho-Tamayo,Jesus H.; Barbosa,Angela M.; Pérez,Nancy M.; Leiva,Fabio R.; Rodríguez,Gonzalo A.. |
| The use of fertilizers and solid amendments in agriculture generates special interest for their effect on crop productivity, as well as for their environmental impact. The efficient use of these products demands knowing their physical and mechanical properties, the storing conditions effect and the operational characteristics of the metering systems used in the fertilizing equipment. In this context, the present study was developed with the purpose of evaluating the operational characteristics of different fertilizing metering systems and to determine the adequate metering system-product operational parameters, using powder lime, powder gypsum, granular 10-30-10 (N-P-K), and granular urea. Operational differences were established among four types of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilizer metering system; Agricultural machinery; Granular material. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162009000400010 |
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| Alcantara,Aline S.; Ormond,Antonio T. S.; Sousa Júnior,Paulo R. de; Silva,Rouverson P. da; Kazama,Elizabeth H.. |
| ABSTRACT Semi-mechanical and mechanical harvesting methods may influence the content of impurities in harvested sugarcane. This study aimed to evaluate the quality of three mechanical methods of sugarcane harvesting: one semi-mechanical, and two mechanical ones - self-performed and outsourced, during three working shifts. As quality indicators, both mineral and vegetal impurities were accounted. About 50 random samples were collected in the studied area during 35 harvest days and in three working shifts, for each harvesting method. Mineral impurities showed similar behavior for both self-performed and outsourced mechanical harvesting, thus displaying a low variability. On the other hand, vegetal impurities showed to be unstable for all three shifts.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mechanical harvesting; Agricultural machinery; Statistical process control; Saccharum officinarum. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300510 |
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| Spagnolo,Roger T.; Custódio,Tiago V.; Morais,César S. de; Reis,Ângelo V. dos; Machado,Antônio L. T.. |
| ABSTRACT Pesticide environmental risks and increased weed resistance have encouraged studies for alternatives to herbicides. Among these are weed thermal control methods by controlled heat application machines. Thus, this study aimed to test a prototype of heat-applicator machine as a function of changes in gas pressure, travel speed, and tire traffic effect on plants. Then, three experimental factors were tested: gas pressure (98, 196, and 245 kPa), travel speed (0.56, 0.78, and 1.17 m s−1), and tire traffic effect on plants (with and without traffic). The results showed that tire traffic effect on plants and subsequent heat application had no effect on control rate. Weed control rates reached levels considered satisfactory using a heat application speed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thermal control; Agricultural machinery; Organic production. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000500595 |
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| Spagnolo,Roger T.; Volpato,Carlos E. S.; Barbosa,Jackson A.; Palma,Marcos A. Z.; Barros,Murilo M. de. |
| When using appropriate inflation pressures and load capacity (ballast), it may obtain a higher yield and prolongation of the life of the tire, besides it may minimize the problems of loss of traction, increased slippage and fuel consumption. This study aimed to evaluate the fuel consumption of a tractor operating with new and worn tires in three conditions of ballasting and three inflation pressures, when driving on compacted soil with vegetation cover. The experiment was conducted at the experimental unit from the Department of Animal Science, Federal University of Lavras, state of Minas Gerais, Brazil, in an agricultural soil compacted by cattle trampling and with vegetation cover. It was used a tractor 4x2 with front wheel assist, of a 65.62 kW engine... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural machinery; Tractor test; Tractive force. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000100014 |
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| Faria,Luís F. F.; Silva,João E. A. R.. |
| ABSTRACT The aim of this study was to evaluate the effects of modifying the maintenance programming of equipment used in sugarcane mechanical harvesting, by transferring actions that can be planned to periods when machines are inactive due to meal breaks and other working shift transitions stoppages. A simulation model was developed to represent the maintenance procedures of combines, haulouts, and other vehicles used by a harvest team. Scenarios were tested using alternatives for interventions such as refueling, lubrication and harvester blade replacement, enabling strategies to be focused towards better utilization of cutting, loading, and transport (CLT) system equipment. As a result, it was possible to remove one combine and two haulouts, while... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural machinery; Breakdowns; Simulation. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000601187 |
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| Becker, Rafael Sobroza; Alonço, Airton dos Santos; Francetto, Tiago Rodrigo; Carpes, Dauto Pivetta; Zart, Bruno Christiano Correa Ruiz; Moreira, Antonio Robson. |
| The objective of this study was to evaluate the operating performance of crop residue cutting discs with distinct cutting edges in the no-tillage system, in relation to the travel speed of the tractor/tool holder set. The experiment was carried out in an experimental area, the soil classified as Paleudalf. The experiment consisted in a factorial arrangement of 4x4, totaling 16 combinations of treatments and three replications, composed by the interaction of the factors: crop residue cutting discs (plain flat disc, wavy disc, rippled disc, and helical wavy disc coulter) and travel speed (1.11; 1.67; 2.22 and 2.78 m s-1). It was used a mobile tool holder structure for the coupling of the active organs, which was pulled by a farm tractor. For the collection... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Field trial; Agricultural machinery; Machine-soil ratio; Planter; Agricultural Engineering. |
| Ano: 2019 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5116 |
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| najafi, payam; asoodar, mohammad amin; marzban, afshin; hormozi, mohammad ali. |
| the performance of agricultural machines depends on the reliability of the machinery used, the operating environment, the maintenance efficiency, the operating process, the technical expertise of the farmers and etc. As the size and complexity of farm equipment continue to increase, the implications of equipment failure become over more critical. Therefore, reliability analysis is required to identify the bottlenecks in the system and to find the components or subsystems with low reliability for a given designed performance. It is important to select a suitable method for data collection as well as for reliability analysis. This paper presents a case study describing reliability and availability analysis of the sugarcane 7000 series chopper harvester at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural machinery; Availability; Reliability analysis; Sugarcane harvester. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3104 |
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| Alam, M. Monjurul; khan, M. I. N.; Saha, Chayan Kumer; Rahman, Anisur; Bhuyian, M. G. K.. |
| Despite numerous limitations, agricultural machinery (AM) manufacturing sub-sector inBangladeshis growing quite satisfactorily and has potential to make substantial contribution to much needed non-farm economic growth, employment generation, mechanization of on and off-farm agricultural activities, and as a whole orientation in the national development. This study made an attempt to take account of AM manufacturers, importers, traders/wholesalers and retailers, their associations, assess market potential and identify serious bottlenecks associated with this sub-sector. Stratified random sampling technique was used for identifying respondents in quantitative survey, while focus group discussions (FGDs) and Key Informant Interviews (KIIs) were conducted... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural machinery; Spare parts; Manufacturing; Supply chain; Marketing; Import vs local quality; Constraints. |
| Ano: 2017 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3682 |
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| Registros recuperados: 26 | |
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