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| Registros recuperados: 14 | |
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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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| Zerbato,Cristiano; Furlani,Carlos E. A.; Almeida,Rodrigo F; Voltarelli,Murilo A.; Silva,Vicente F. A.. |
| ABSTRACT Peanut crop (Arachis hypogaea L.) mechanization has been improved over the years; however there are drawbacks that affect the quality of operations. Thus, this article’s objectives were to evaluate the operational performance of the mechanized sowing of peanut crop according to seeding densities (10, 14, and 18 seeds m-1) and seed sizes (21 and 23 mm). It was observed that the seeds of 23 mm had shorter average number of days to emergence and a higher percentage of emergences, occurring the opposite to the seeding density of 18 seeds m-1. The higher the seeding density, the largest was the plant stand, whereas the 23 mm seed obtained the best results and the same with the seeding density of 14 seeds m-1 that had a higher percentage of normal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachis hypogaea L.; Agricultural mechanization; Seeder-fertilizer. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000400711 |
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| Carneiro,Franciele M.; Furlani,Carlos E. A.; Zerbato,Cristiano; Menezes,Patricia C. de; Gírio,Lucas A. da S.. |
| ABSTRACT Active optical sensors have been widely used for the spatial and temporal monitoring of peanut culture because they are accurate, non-destructive methods for rapidly obtaining data. The objective of this study was to determine the optimal stage of crop growth for collecting sensor readings based on correlations between quality indicators. In addition, we compared vegetation indices (Normalized Difference Vegetation Index [NDVI], Normalized Difference Red-Edge Index, [NDRE], and Inverse Ratio Vegetation Index, [IRVI]) by monitoring temporal variability in the peanut crop in order to determine which of them obtained the best reading quality throughout the process. The experiment was performed on the 2016/17 crop in the agricultural area of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Remote sensing; Arachis hypogaea L.; Control charts; Precision agriculture. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000800033 |
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| Zerbato,Cristiano; Furlani,Carlos E. A.; Silva,Rouverson P. da; Voltarelli,Murilo A.; Santos,Adão F. Dos. |
| ABSTRACT The digging of peanut, which has the pod production in the subsurface, is directly affected by soil conditions, physical or environmental characteristics, at the time of operation and may be the cause of unwanted losses. Therefore, the quality of the operation is very important for minimizing these losses. Thus, this study aimed to evaluate the quality of mechanized digging operation of peanut according to three soil textural classes (Sandy, Medium and Loamy) and their water content conditions at operation through statistical process control. The experiment was conducted at three locations in the state of São Paulo, Brazil, under sampling scheme arranged in tracks and 40 sampling points for each textural class of soil, using the mechanical digging... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachis hypogaea L; Losses; Quality; Soil water content; Water content of the pods. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200315 |
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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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| Voltarelli,Murilo A.; Silva,Rouverson P. da; Zerbato,Cristiano; Paixão,Carla S. S.; Tavares,Tiago de O.. |
| ABSTRACT Statistical process control in mechanized farming is a new way to assess operation quality. In this sense, we aimed to compare three statistical process control tools applied to losses in sugarcane mechanical harvesting to determine the best control chart template for this quality indicator. Losses were daily monitored in farms located within Triângulo Mineiro region, in Minas Gerais state, Brazil. They were carried over a period of 70 days in the 2014 harvest. At the end of the evaluation period, 194 samples were collected in total for each type of loss. The control charts used were individual values chart, moving average and exponentially weighted moving average. The quality indicators assessed during sugarcane harvest were the following loss... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Quality; Agricultural mechanization; Moving average; EWMA. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000601079 |
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| Voltarelli,Murilo A.; Paixão,Carla S. S.; Zerbato,Cristiano; Silva,Rouverson P. da; Gazzola,Jonathan. |
| ABSTRACT The quality control is used for the evaluation of processes and products, and it is important to detect and reduce variability and in operations management can be applied in mechanized harvesting of sugarcane billets. In this sense, this study aimed to identify critical quality indicators and, if necessary, to develop a continuous improvement plan for harvest of sugarcane billets. For the survey and definition of critical quality indicators the FMEA (Failure Mode and Effect Analysis) was applied, after the formation of the quality technical team. Evaluations of the collected variables were through control charts of individual values and the process capability indexes. There are 8 critical quality indicators in the billets harvesting process; the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Quality control; Flowchart; Agricultural mechanization; PDCA; Harvester. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000100088 |
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| Cassia,Marcelo T.; Voltarelli,Murilo A.; Silva,Rouverson P. da; Zerbato,Cristiano; Lima,Pedro H. de. |
| RESUMO A operação de colheita mecanizada de sementes demanda que as regulagens das colhedoras sejam dinâmicas, fato que afeta diretamente a qualidade da operação e dos grãos colhidos. Desta forma, o objetivo do presente trabalho foi monitorar, em intervalos regulares de tempo, a qualidade da operação de colheita de sementes de soja realizada simultaneamente por duas colhedoras de grãos, com emprego do controle estatístico de qualidade (CEQ). O trabalho foi realizado em um campo de produção de sementes na região de Catalão, GO, onde foram monitorados o desempenho operacional das colhedoras, as perdas quantitativas na colheita e as perdas qualitativas das sementes. Observou-se que as colhedoras monitoradas operaram em condições semelhantes porém as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Colhedora de grãos; Perdas na colheita; Controle estatístico de qualidade (CEQ). |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001201209 |
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| Corrêa,Rafael D. G.; Furlani,Carlos E. A.; Zerbato,Cristiano; Oliveira,Danilo T. de; Noronha,Rafael H. de F.; Warikoda,Newton K.. |
| ABSTRACT Among the factors that may influence corn yield are sowing operation direction and plant population, since they alter the shade index between crop rows, and consequently the efficiency of interception of the photosynthetically active radiation by the leaves of plants. The aim of this study was to evaluate the influence of sowing direction and plant populations on P2830VYH hybrid corn yield. The experiment was conducted at the facilities of FCAV-UNESP, latitude 21º 14’ S and longitude 48º 16’ W in Jaboticabal (SP). The treatments were composed of three sowing directions (North-South, Northeast-Southwest, and East-West) and three population densities (40,000, 60,000 and 80,000 plants ha-1). The treatment with 80,000 plants ha-1 had the lowest cost... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Sowing configuration; Plant population; Grain yield. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000300183 |
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| Zerbato,Cristiano; Furlani,Carlos E. A.; Oliveira,Mailson F. de; Voltarelli,Murilo A.; Tavares,Tiago de O.; Carneiro,Franciele M.. |
| ABSTRACT Over the past decade, automatic guidance of agricultural machinery via Global Navigation Satellite System (GNSS) signals has been increasingly adopted by the farming community. Peanut farmers are adopting such technology in order to improve the parallelism of operations to address difficulties that occur in mechanical digging, where losses are a big problem. This study aimed to evaluate mechanized operations of peanut sowing and digging controlled manually and by autopilot, along with their quality. The treatments consisted of two digging operations, with and without autopilot, and two displacement speeds (4.5 and 6.0 km h-1). The experiment was conducted in a medium-textured soil in a completely randomized design arranged in bands, using the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachis hypogaea L.; Statistical process control; Kinematic relative positioning; Parallelism; Digging losses. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000800630 |
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| Sousa Junior,Paulo R. de; Brunharo,Caio A. C. G.; Furlani,Carlos E. A.; Prado,Renato de M.; Maldonado Júnior,Walter; Zerbato,Cristiano. |
| ABSTRACT Soil preparation along with its chemical adjustment is the most important step in sugarcane plantation, especially because it provides proper conditions for plant development. The objective of the present research was to evaluate sugarcane response to the application of different phosphorus doses and their location, associated with both minimum soil tillage and conventional soil tillage. The experiment was conducted in a split-split-plot randomized block design, where the main plots were subjected to soil managements (minimum soil tillage or conventional soil tillage), the subplots to phosphorus doses in total area, and the sub-sub-plots to phosphorus doses in the crop rows. The evaluated variables were soil chemical parameters, sugarcane... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilization management; Phosphorus application; Minimum tillage; Fertilizer incorporation; Saccharum officinarum. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001000665 |
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| Zerbato,Cristiano; Silva,Vicente F. A.; Torres,Luma S.; Silva,Rouverson P. da; Furlani,Carlos E. A.. |
| The largest losses in mechanical harvesting of peanuts occur during the stage of digging, and its assessment is still incipient in Brazil. Therefore, the aim of this study was to evaluate the quantitative losses and the performance of the tractor-digger-inverter, according to soil water content and plant populations. The experiment was conducted in a completely randomized block design with a factorial scheme 2 x 3, in which the treatments consisted of two soil, water content (19.3 and 24.8%) and three populations of plants (86,111, 127,603 and 141,144 plants ha-1), with four replications. The quantitative digging losses and the set mechanized performance were evaluated. The largest amount of visible and total losses was found in the population of 141.144... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachis hypogaea L.; Crop losses; Digger-inverter; Operating performance. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014000400015 |
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| Santos,Edvaldo Pereira dos; Silva,Rouverson Pereira da; Bertonha,Rafael Scabello; Noronha,Rafael Henrique de Freitas; Zerbato,Cristiano. |
| A colheita é momento crítico na produção do amendoim (Arachis hypogaea L.), porém, nesta operação as perdas são inevitáveis, podendo chegar, em alguns casos, a valores de até 30% da produtividade. O amendoim é cultivado em um curto período de tempo durante a reforma dos canaviais, o que proporciona melhor uso dos espaços agrícolas na região de Jaboticabal, SP. Objetivou-se com esta pesquisa definir a antecipação do arranquio do amendoim a partir da determinação da maturação. Realizou-se o arranquio do amendoim aos 120; 125; 130; 135 e 140 dias após a semeadura. Os resultados foram submetidos à análise de variância pelo teste F e quando houve significância das médias, aplicou-se o teste de Tukey a 5% de probabilidade, mediante uso do diagrama de caixas para... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amendoim; Plantas-maturação; Época de colheita. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000400005 |
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| Registros recuperados: 14 | |
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