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| Noronha,Rafael H. F.; Zerbato,Cristiano; Silva,Rouverson P. da; Ormond,Antonio T. S.; Oliveira,Mailson F. de. |
| ABSTRACT The peanuts harvesting mechanization is affected by the soil physical characteristics and it may increase the losses due to the production of pods in subsurface. The objective of the experiment was to identify the clusters through multivariate exploratory approaches from similarity in six soil textures (very clayey, clayey, silty clayey loam, clayey loam, sandy loam and sandy) in the state of São Paulo, Brazil, determining the main agronomic variables that most influenced the clustering division to assist the decision-making process in peanuts mechanized harvesting. The data were analyzed by the multivariate exploratory that is performed to simplify the description of a set of interrelated variables, using: yield, maturity, soil and pod moisture... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil textural classes; Arachis hypogaea L.; Principal components analysis. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000200244 |
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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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| Ormond,Antonio T. S.; Dos Santos,Adão F.; Alcantara,Aline S.; Zerbato,Cristiano; Furlani,Carlos E. A.. |
| ABSTRACT In Brazil, a large portion of peanut production is found under conventional soil preparation. Due to the fact that there is a lack in studies related to the cultivation of peanuts in conservationists soil preparation, mainly in the field of losses and mechanized harvesting. Thus, it was aimed to assess the quality of digging and gathering operation of peanut, based on losses, using statistical process control techniques in two tillages. The sowing was carried out under conventional and conservationist preparation, revolving only the sowing line. Losses were evaluated in the digging and gathering operation, being that in the gathering it was evaluated the harvest losses in three displacement speeds (4, 6 and 8 km h-1) in two tillages. The quality... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digging; Statistical process control; Losses; Gathering. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000200251 |
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| Santos,Adão F. dos; Silva,Rouverson P. da; Tavares,Tiago O.; Ormond,Antonio T. S.; Rosalen,David L.; Assis,Leonardo C. de. |
| ABSTRACT GNSS positioning errors are certain, regardless of the adopted positioning method. In agriculture, these errors may represent higher or lower overlapping rates between passes of a mechanical assembly, affecting operation quality. Therefore, this study evaluated the main errors arising from peanut sowing operation performed with an auto-steer guidance system by an RTX signal, using the Statistical Process Control techniques. The errors evaluated were: in tractor lateral displacement, project execution, and parallelism between passes of tractor-seeder set. The average errors of project execution in all passes were within the range specified by the manufacturer, i.e. lower than 3.8 cm. The average error of tractor-seeder set was also within the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Autopilot; Precision agriculture; Electric auto-steering; RTX; GNSS. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001000731 |
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