Auger-type granular fertylizer distributor: matemathical model and dynamic simulation

García, Ángel Pontín; Cappelli, Nelson Luis; Umezu, Cláudio Kiyoshi

doi:10.1590/s0100-69162012000100016

Cited by 7 publications

(12 citation statements)

References 7 publications

(13 reference statements)

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“…This value is lower than the CV calculated for granule mixtures obtained by Garcia et al (2012) and close to those observed by Reynaldo & Gamero (2015).…”

Section: Performance Of Fertilizer Metering Mechanisms Of Planters Assupporting

confidence: 49%

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Performance of Fertilizer Metering Mechanisms of Planters as a Function of Longitudinal Inclination

et al. 2017

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Sowing occurs in agricultural areas with irregular relief, influencing the quality of seed and fertilizer distribution. The aim of this study was to analyze the performance of different fertilizer metering mechanisms of planters as a function of longitudinal inclination. The experimental design was a completely randomized design with five treatments and six replications. Treatments consisted of five longitudinal inclinations to the metering mechanism (−10, −5, 0, 5, and 10 degrees). The mass of fertilizer collected per minute was considered as a replication. We worked with two types of fertilizers: a mixture of granules and powder. Metering mechanisms used were a horizontal toothed rotor, helical without flow restrictor, helical with lateral overflow, and helical with longitudinal overflow. The longitudinal inclination of ±10° in relation to the leveling altered the metered amount of both fertilizers used in all metering mechanisms. The helical with lateral overflow was the metering mechanism that obtained the smallest amount variation of fertilizer distributed in the different longitudinal inclinations, followed by the helical with longitudinal overflow, horizontal toothed rotor, and helical without flow restrictor.

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“…This value is lower than the CV calculated for granule mixtures obtained by Garcia et al (2012) and close to those observed by Reynaldo & Gamero (2015).…”

Section: Performance Of Fertilizer Metering Mechanisms Of Planters Assupporting

confidence: 49%

“…When assessing a mathematical model and simulating the dynamic behavior of a helical fertilizer metering, Garcia et al (2012) obtained a reduction in the coefficient of variation (CV) from 30 to 11%. This reduction was achieved due to the application rate compensation and the delay of the action signal.…”

Section: Introductionmentioning

confidence: 99%

Performance of Fertilizer Metering Mechanisms of Planters as a Function of Longitudinal Inclination

et al. 2017

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“…Tais mecanismos podem assumir diversas disposições construtivas sendo encontradas, no mercado brasileiro, várias opções. Mesmo com os avanços tecnológicos dos mecanismos utilizados na aplicação de fertilizantes é possível afirmar que, por diversos motivos, a qualidade da distribuição ainda é aquém do desejado (Ferreira et al, 2010;Bonotto, 2012;Garcia et al, 2012).…”

Section: Introductionunclassified

“…Garcia (2007) afirma que a modelagem é uma ferramenta potente para auxiliar no projeto dos sistemas de controle para aplicação a taxas variáveis. Olieslagers et al (1996) afirmam que para o desenvolvimento desses sistemas de controle é conveniente desenvolver modelos que considerem parâmetros relativos ao fertilizante bem como as disposições construtivas e operacionais dos dosadores utilizados.…”

Section: Introductionunclassified

Modelos estatísticos para seleção de dosadores helicoidais com diferentes dispositivos de descarga de fertilizante

Franck

Alonço

Machado

et al. 2015

Rev. bras. eng. agríc. ambient.

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R E S U M OO presente trabalho teve por objetivo desenvolver uma ferramenta capaz de expressar matematicamente a taxa de aplicação de fertilizante em função do tipo de dosador, inclinação longitudinal, inclinação transversal e velocidade de acionamento do dosador. Foram utilizados três dosadores helicoidais com dispositivos de descarga por gravidade, transbordo transversal e transbordo lateral e adotado o delineamento composto central rotacional, com três variáveis independentes. A partir dos modelos ajustados constatou-se que os dispositivos de descarga apresentam diferentes implicações em relação aos efeitos de inclinações longitudinais e transversais de operação. O dosador com descarga por gravidade demonstrou maior sensibilidade quanto aos efeitos das inclinações de operação e o dosador com descarga por transbordo lateral demonstrou menor sensibilidade. A análise de regressão demonstrou que todos os modelos foram significativos, sendo encontrados baixos erros relativos e absolutos dos dados previstos pelos modelos.Mathematical models for selection of helical fertilizer metering mechanism with different fertilizer discharge A B S T R A C TThis study aimed to develop a tool capable of expressing mathematically the rate of fertilizer application depending on the type of distributor, longitudinal slope, cross slope and driving speed of distributor. Three helical distributors with gravity discharge, transverse discharge through overflow and side discharge through overflow were used. The central composite rotational design with three independent variables was adopted. From the adjusted models it was found that the discharge devices have different implications for the effects of longitudinal and transversal slopes of operation. The distributor with gravity discharge showed greater sensitivity to the effects of slopes and the distributor side discharge through overflow showed lower sensitivity. Regression analysis showed that all models were significant, and found low relative and absolute errors of the data predicted by the models. Palavras-chave:semeadora adubadora taxa de aplicação de fertilizantes mecanização agrícola

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“…Serrano et al (2007) performed static and dynamic tests using a centrifugal fertilizer distributor for precision agriculture and observed the capacity of the equipment to autoregulate according to the variations in the working velocity and in the applied doses as a function of the georeferenced position in the plots. Garcia et al (2012) modeled and simulated the dynamic behavior of an auger-type fertilizer applicator in order to use the variable-rate application and reduce the coefficient of variation (CV) of the application. The model allowed developing strategies for an effective action in order to reduce significantly the CV of the fertilizer application rate.…”

Section: Introductionmentioning

confidence: 99%

Performance of a variable-rate distribution system for simultaneous fertilizer application

Barros

Volpato

Silva

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe objective of this study was to evaluate the performance of a variable-rate fertilizer distribution system for coffee crop, simultaneously applying two products. Two types of tests were performed: transversal deposition and longitudinal deposition. The transversal deposition test, with tarps, aimed to quantify the variations between programmed and applied doses, using a completely randomized design (CRD), in a factorial scheme, and the Scott-Knott test at p < 0.05. The longitudinal deposition test aimed to determine the distribution characteristics of the equipment along the displacement line, based on relative frequency values. In addition, the application rates on both sides of the distribution system were analysed using a CRD and the Scott-Knott test at p < 0.05. The application variation in the transversal deposition test with tarps was 1.59%. The variable-rate distribution system remained stable regarding the longitudinal deposition, regardless of any interaction.Desempenho de um sistema de distribuição de fertilizantes de aplicação simultânea a taxa variável R E S U M O Objetivou-se, neste trabalho, avaliar o desempenho de um sistema de distribuição de fertilizantes a uma taxa variável para a cultura do café aplicando dois produtos simultaneamente. Realizaram-se dois tipos de ensaio: o de deposição transversal e de deposição longitudinal utilizando-se, nesses ensaios, delineamento inteiramente casualizado (DIC) em esquema fatorial sendo realizado o teste de Scott-Knott a 0,05 de probabilidade. Nos ensaios de deposição transversal objetivou-se quantificar as variações entre as doses programadas e aplicadas enquanto os ensaios de deposição longitudinal tiveram, como objetivo, a determinação das características de distribuição do equipamento ao longo da linha de deslocamento analisados através de valores de frequência relativa; outro fator analisado foi o comportamento de aplicação das doses nos dois lados de distribuição do sistema; observou-se que a variação de aplicação no ensaio de deposição transversal com lonas foi de -1,59%; o sistema de distribuição a uma taxa variável se manteve estável em relação à deposição longitudinal independente de qualquer interação.

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Auger-type granular fertylizer distributor: matemathical model and dynamic simulation

Cited by 7 publications

References 7 publications

Performance of Fertilizer Metering Mechanisms of Planters as a Function of Longitudinal Inclination

Performance of Fertilizer Metering Mechanisms of Planters as a Function of Longitudinal Inclination

Modelos estatísticos para seleção de dosadores helicoidais com diferentes dispositivos de descarga de fertilizante

Performance of a variable-rate distribution system for simultaneous fertilizer application

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