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| Maciel,Christiam Felipe Silva; Teixeira,Mauri Martins; Fernandes,Haroldo Carlos; Zolnier,Sérgio; Cecon,Paulo Roberto. |
| ABSTRACT An efficient pesticides spraying depends a lot in psychrometric conditions, mainly if it is using fine droplets, once climatic conditions may cause droplets evaporation and consequent financial loss to the farmer. Thus, the aim of this work was to determine the droplet spectrum depending on the vapour pressure deficits. The work was carried out inside of a climate chamber to obtain the vapour pressure deficits (VPDair). The laser particle analyzer, model Spraytech, was used to determine the droplet spectrum, and the experiment was conducted in factorial scheme 5 x 20, consisted of five working pressures (100; 200; 300; 400 and 500 kPa) and twenty VPDair (2.3; 3.2; 4.2; 5.6; 7.0; 7.4; 9.5; 11.7; 12.7; 15.8; 16.4; 16.9; 21.2; 22.1; 22.2; 28.1; 29.7;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Droplets diameter; Droplets evaporation; Hydraulic spraying; Spraying technology. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000100041 |
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| Penido,Édilus de Carvalho Castro; Teixeira,Mauri Martins; Fernandes,Haroldo Carlos; Monteiro,Paulo Barros; Cecon,Paulo Roberto. |
| ABSTRACT The tomato is one of the main crops in Brazil. In large-scale cultivation, pesticides are applied to the plant to prevent the direct or indirect action of animal or vegetable life, aiming at higher productivity and better quality fruit. However, the products, if used incorrectly, may affect the health of workers involved in the activity. A prototype of a self-propelled sprayer, remotely controlled and monitored via radio signals, was therefore developed to be used in tomato crops, thus minimising worker contact with the chemical substances used when spraying. The basic prototype comprises an agricultural mini-tractor, a motorised pneumatic sprayer (atomiser) and a set of electronic and mechanical sensors and actuators, which allow the assembly to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Self-propelled agricultural machinery; Teleoperation of tractors; Spraying technology; Spraying tomato crops; Spraying evaluation. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000100008 |
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