Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 25
Primeira ... 12 ... Última
Imagem não selecionada

Imprime registro no formato completo
Application of PFC3D to simulate a planetary ball mill CIGR Journal
Chen, Ying; Guzman, Leno; Potter, Simon; Khan, Majibur.
Planetary ball mill is a versatile machine which has been used for grinding different types of materials for size reduction and lately for hemp decortication. PFC3D, software employing the discrete element method (DEM), was used to simulate the power and energy requirement of grinding hemp for fibre using a planetary ball mill. The simulation was facilitated through a series of hemp grinding tests using the planetary ball mill to examine the power draw of the mill. The test results identified that grinding speed had a significant effect on the power draw of the mill. The power draw data were used to calibrate the discrete element parameters for different grinding speeds. Using the calibrated parameters, one was able to predict the kinetic energy and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural machinery; Bioprocessing PFC3D; Discrete element model (DEM); Hemp; Planetary ball mill; Power; Energy; Kinetic; Friction.
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2986
Imagem não selecionada

Imprime registro no formato completo
Conceptual design of a thermal weed control machine Ciência Rural
Spagnolo,Roger Toscan; Oldoni,André; Custódio,Tiago Vega; Reis,Ângelo Vieira dos; Machado,Antônio Lilles Tavares.
ABSTRACT: The great difficulty for family farmers who produce food organically is the control of weeds without using chemical products. One possibility for the management is the use of heat in the sense of coagulating the protoplasm in leaves and stem cells. The present research aimed toconceptual design a mechanized system for weeds control through the use of heat focusing on familiar farmers who produce food organically. In this study, we used a product development methodology which can be divided into different stages that are composed of several tasks. As a result of the use of such methodology, six concepts of heat transfer machines were developed. After the application of selection tools, two concepts were chosen for the optimization process, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Product development; Agricultural machinery; Organic production.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000300350
Imagem não selecionada

Imprime registro no formato completo
Design requirements of a human-powered planter Ciência Rural
Stefanello,Giusepe; Machado,Antônio Lilles Tavares; Reis,Ângelo Vieira dos; Morais,César Silva de; Oldoni,André.
ABSTRACT: This study aimed to establish client and design requirements of a human-powered planter. A total of 13 client requirements and 13 design requirements were established for prioritizing planter performance, thus providing benefits to users.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Machinery design; Precision planter; Agricultural machinery.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000600402
Imagem não selecionada

Imprime registro no formato completo
Design specifications of a human-powered planter Ciência Rural
Stefanello,Giusepe; Machado,Antônio Lilles Tavares; Reis,Ângelo Vieira dos; Machado,Roberto Lilles Tavares; Morais,César Silva de.
ABSTRACT: This study aimed to establish the design specifications of a human-powered punch planter for maize and beans through the application of a systematic design methodology. The most important design requirements and their specifications are related to technical performance and production cost.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Machinery design; Manual seeder; Agricultural machinery.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001202118
Imagem não selecionada

Imprime registro no formato completo
Early Trends, Current Status and Future Prospects of Farm Mechanization in Asia CIGR Journal
Rehman, Tanzeel; Khan, Muhammad Usman.
During the last five decades Asia has made considerable development in the field of agricultural machinery. During the year 1960 the condition of mechanization was very poor and most of the farm operations were performed manually. A positive correlation between the farm power availability and the productivity was observed during past 3 decades for several Asian nations including China, Pakistan, India, and Bangladesh. The previous trends have shown that the Pakistan, India and Bangladesh have experienced only the selective farm mechanization which was found to be initially limited to the use of heavy tractors only. In addition to the full-scale tractors, China, India and Bangladesh have adopted the power tillers and small-scale tractors to co-op with the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Farm mechanization; Asia; Agriculture; Agricultural machinery; Mechanization strategy.
Ano: 2019 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5437
Imagem não selecionada

Imprime registro no formato completo
EFFECT OF THE DISTANCE BETWEEN THE CUTTING DISC AND FURROW OPENERS EMPLOYED IN ROW CROP PLANTING ON SOIL MOBILIZATION REA
Francetto,Tiago R.; Alonço,Airton dos S.; Becker,Rafael S.; Scherer,Vitor P.; Bellé,Mateus P..
ABSTRACT The objective of this study was to determine the effect of the longitudinal distance between a cutting disc and a fertilizer furrow opener on the operational performance of the furrow opener working at different forward speeds during soil mobilization. The soil in the experimental area was classified as Typic Hapludalf with a loam soil texture. The experiment involved 24 treatment combinations in a 2 × 3 × 4 factorial scheme. These combinations were formed by the interaction of the following factors: furrow opening mechanisms, longitudinal distance from the center of the cutting mechanism to center of the furrow opener, and forward speeds. The effects of the tools on the soil mobilization variables were characterized in three phases: analysis of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Machinery-soil relation; Agricultural machinery; Field test; Direct planting.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162021000200148
Imagem não selecionada

Imprime registro no formato completo
Effects of maintenance management procedures in sugarcane mechanic harvesting system equipment REA
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
Imagem não selecionada

Imprime registro no formato completo
Electrically driven fertilizer applicator controlled by fuzzy logic REA
Garcia,Angel P.; Cappelli,Nelson L.; Umezu,Claudio K..
The present study shows the development, simulation and actual implementation of a closed-loop controller based on fuzzy logic that is able to regulate and standardize the mass flow of a helical fertilizer applicator. The control algorithm was developed using MATLAB's Fuzzy Logic Toolbox. Both open and closed-loop simulations of the controller were performed in MATLAB's Simulink environment. The instantaneous deviation of the mass flow from the set point (SP), its derivative, the equipment´s translation velocity and acceleration were all used as input signals for the controller, whereas the voltage of the applicator's DC electric motor (DCEM) was driven by the controller as output signal. Calibration and validation of the rules and membership functions of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fertilizer applicator; Agricultural machinery; Closed-loop control.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000300014
Imagem não selecionada

Imprime registro no formato completo
Escarificação do solo em soqueiras de cana-de-açúcar. Infoteca-e
SA, M. A. C. de; SANTOS JUNIOR, J. de D. G. dos; FRANZ, C. A. B.; REIN, T. A..
bitstream/item/131269/1/cirtec-28.pdf
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Goias; Cana-de-açúcar; Escarificação do solo; Preparo do solo; Agroenergia; Brasil; Soil tillage; Soil bulk density; Agricultural machinery; Soil scarification; Savanna.; Cerrado; Compactação do Solo; Maquina Agrícola; Produtividade; Saccharum Officinarum.; Brazil; Bioenergy; Sugarcane.; Soil compaction.
Ano: 2015 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1026342
Imagem não selecionada

Imprime registro no formato completo
Fuel consumption of a tractor in function of wear, of ballasting and tire inflation pressure REA
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
Imagem não selecionada

Imprime registro no formato completo
HEAT-APPLICATOR MACHINE FOR WEED CONTROL REA
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
Imagem não selecionada

Imprime registro no formato completo
Maintenance management of tractors and agricultural machinery: Preventive maintenance systems CIGR Journal
Khodabakhshian, Rasool.
Agricultural machinery maintenance has a crucial role for successful agricultural production.  It aims at guaranteeing the safety of operations and availability of machines and related equipment for cultivation operation.  Moreover, it is one major cost for agriculture operations.  Thus, the increased competition in agricultural production demands maintenance improvement, aiming at the reduction of maintenance expenditures while keeping the safety of operations.  This issue is addressed by the methodology presented in this paper.  So, the aim of this paper was to give brief introduction to various preventive maintenance systems specially condition-based maintenance (CBM) techniques, selection of condition monitoring techniques and understanding of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural machinery; Fault detection; Fault diagnosis; Signal processing; Maintenance management.
Ano: 2013 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2616
Imagem não selecionada

Imprime registro no formato completo
Manufacturing of agricultural machinery in Bangladesh: opportunities and constraints CIGR Journal
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
Imagem não selecionada

Imprime registro no formato completo
Near accidents with agricultural vehicles, machinery and equipment in Austria in the year 2013 CIGR Journal
Kogler, Robert.
Near accidents are in the lowest stage of the accident pyramid. A near accident is defined as an unplanned event, which includes a potential accident risk, but does not bring any injury or property damage with it. The consideration of near accident plays a very significant role in accident prevention. Near accident research provides an acceptable tool to determine safety deficiencies, potential risks and hidden dangers in various work areas early enough to avoid actual accidents. The aim of the study was to identify safety weaknesses of agricultural and forestry vehicles, machinery and equipment which almost led to an accident with workers in agriculture and forestry in Austria. Also to detect weaknesses and deficits in the design to derive improvements in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Work safety; Ergonomics Near accidents; Agricultural machinery; Near accident analysis; Statistical analysis.
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3087
Imagem não selecionada

Imprime registro no formato completo
New mechanized system for circle spraying of oil palms seedling emergence Scientia Agricola
El Pebrian,Darius; Yahya,Azmi.
A new machine system has been designed, developed and evaluated for extensive circle spraying of oil palms (Elaeis guineensis Jacq.) in an effort to overcome the inefficient spraying problem with the conventional spraying system. The machine system consists of a four-wheeled drive 4WD prime mover with front mounted machine attachments for the circle spraying operation. The configuration of the circle spraying attachment consists of a hexagonal curved spray boom, lifting arm, opening-tilting mechanism unit, storage tank, spray pump, solid cone nozzles, and associate hydraulic system. Field performance tests on the machine system showed an average effective field capacity of 7.89 ha per man per day and when compared to the earlier reported effective field...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chemical spraying; Oil palm cultivation; Agricultural machinery; Mechanization.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000200002
Imagem não selecionada

Imprime registro no formato completo
O inventário das tecnologias disponíveis- uma reflexão sobre as tecnologias adaptadas a pequena produção: o caso do policultor 1500. Infoteca-e
TONNEAU, J. P.; SILVA, P. C. G. da; PATANCHON, J. L..
Apresenta um roteiro para sistematizacao das propostas tecnicas disponiveis e constitui referencia metodologica para a realizacao do inventario de tecnologias. Apresenta, ainda, um exemplo concreto de uma tecnologia desenvolvida pelo CPATSA: o policultor 1500.
Tipo: Documentos (INFOTECA-E) Palavras-chave: Policultor 1500; Agricultural machinery; Small farmer.; Mecanização Agrícola; Pequeno Produtor; Tração Animal.; Tecnologia; Equipment; Technology..
Ano: 1990 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133599
Imagem não selecionada

Imprime registro no formato completo
Operational characteristics of four metering systems for agricultural fertilizers and amendments REA
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
Imagem não selecionada

Imprime registro no formato completo
Operational performance of crop residue cutting discs in the no-tillage system CIGR Journal
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
Imagem não selecionada

Imprime registro no formato completo
Persistence effect determination of variability in forecasting of agricultural and road machinery national production Ciência Rural
Martins,Tailon; Barreto,Alisson Castro; Coronel,Daniel Arruda; Jacobi,Luciane Flores; Lirio,Valentina Wolff; Souza,Adriano Mendonça.
ABSTRACT: The objective of this research was to forecast the Brazilian national production of agricultural and road machinery in the short term by BOX & JENKINS methodology and determine the persistence effect. Data were obtained at National Association of Automotive Vehicle Manufacturers (ANFAVEA) from January 1960 to October 2019, totaling 718 monthly observations. The Autoregressive Integrated Moving Average (ARIMA) and Autoregressive Conditional Heteroscedasticity (ARCH) methodology were used. The ARIMA (2,1,1)-ARCH (2) model was fitted and persistence of 0.60 was determined, showing that the instability in the series will be for a long period of time.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Time series; Prediction; Volatility; Agricultural machinery; Road machinery.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000600351
Imagem não selecionada

Imprime registro no formato completo
Power demand of a flail shredder during the harvest of pineapple fields Ciencia e Investigación Agraria
Pérez de Corcho Fuentes,Jorge S; Garbati Pegna,Francesco; Iglesias Coronel,Ciro; García Reina,Francisco; Spugnoli,Paolo.
The power demand of the demolition of pineapple (Ananas comosus) fields, whose production cycle is finished with a flail mower with two different knives, a cutting apparatus with three angular velocities, and a tractor with three translation velocities, was determined using strain gage measures. The results of the investigations demónstrate the influence of the knife type and cinematic regime of the cutting apparatus in the demand of energy in the pineapple demolition. Furthermore, they permitted the validation of models of the power demand of the flail mower.
Tipo: Journal article Palavras-chave: Agricultural engineering; Agricultural machinery; Annas comosus; Energy mechanization.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100005
Registros recuperados: 25
Primeira ... 12 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional