Effect of different conductor tubes on the longitudinal distribution of corn seeds

Carpes, Dauto Pivetta; Alonço, Airton dos Santos; Rossato, Fernando; Veit, André Augusto; Souza, Lucas Barros de; Francetto, Tiago Rodrigo

doi:10.1590/1807-1929/agriambi.v21n9p657-662

Cited by 14 publications

(17 citation statements)

References 11 publications

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“…Corn seed distribution was more homogeneous (precision index) in the curved seed tube at all simulated speeds (Figure 4e). Carpes et al (2017) reported better efficiencies for corn seed distribution using the curved seed tube due to a reduction in the seed fall speed promoted by the parabolic profile of the tube, promoting smoother seed flowability to the furrow.…”

Section: Distribution Of Corn Seedsmentioning

confidence: 99%

“…The effect of the construction shape of the seed tube stands out among the factors that influence the longitudinal distribution of seeds, varying the length, angle, and diameter of inlet and outlet (Carpes et al, 2017), in addition to the sowing speed of the seed drill (Nadin et al, 2019). This study aimed to evaluate the influence of the seed tube curvature on the longitudinal distribution of corn and soybean seeds at different sowing speeds.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Seed Tube Curvature on Seed Longitudinal Distribution

et al. 2020

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Studies on the longitudinal distribution of seeds in the sowing row seek to improve crop homogeneity, thus generating high productivity. In this context, seed tubes must be analyzed for their angular curvature. Thus, this study aimed to evaluate the influence of the seed tube curvature on the longitudinal distribution of corn and soybean seeds at different speeds. Two experiments were conducted completely randomized in a double factorial design. The first factor consisted of the seed tube curvature (straight and curved) and the second factor consisted of sowing speeds (1.11, 1.39, and 1.67 m s −1 for corn and 1.39, 1.67, 1.94, and 2.22 m s −1 for soybean), with five replications. The parameters analyzed to measure the longitudinal distribution were the number of seeds per meter, average spacing, double, flawed, and acceptable spacings, coefficient of variation, and precision index. The results were subjected to normality and homogeneity tests of residuals, followed by an analysis of variance and Tukey test, when significant. The curved seed tube showed the highest efficiency in the measured parameters for both corn and soybean. The increase in sowing speed had a negative influence on the evaluated parameters, especially in the soybean crop.

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Section: Distribution Of Corn Seedsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Seed Tube Curvature on Seed Longitudinal Distribution

et al. 2020

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“…A utilizada por Reis et al (2007) é estruturada em coluna tubular metálica única, com uma base estabilizadora inferior fixa. A utilizada por Carpes et al (2017), está configurada em uma estrutura metálica de forma retangular, utiliza uma esteira para o recolhimento e posterior contagem de sementes e análise de espaçamentos. Já a bancada de ensaios desenvolvida neste trabalho usará um 5 3 2 1 8 7 4 6 sensor ótico posicionado na saída da semente do dosador para esse fim.…”

Section: Descriçãounclassified

“…A ABNT (1996) estabelece, no projeto de norma (04:015.06-004/1996) para semeadoras de precisão, dentre outros, métodos de ensaios em laboratório para a avaliação da regularidade de distribuição longitudinal de sementes. Carpes et al (2017), avaliaram a distribuição longitudinal de sementes de milho por diferentes tipos de tubos condutores, variando a densidade de semeadura, e para isso, utilizaram um dosador de disco horizontal e um dosador pneumático. O experimento foi conduzido em laboratório utilizando uma bancada de ensaio de dosadores de sementes.…”

Section: Introductionunclassified

Projeto, desenvolvimento e construção de uma bancada de ensaios para dosadores de semente

2018

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RESUMOEste trabalho teve como objetivo projetar e desenvolver uma bancada de ensaios, que em primeiro momento pudesse ser aplicada para ensaiar dosadores de sementes utilizados em semeadoras, e que apresentasse recursos de regulagem para posteriormente ensaiar outros componentes de máquinas agrícolas. Para o projeto foi utilizado o modelo de fases sendo desenvolvidas as fases: projeto informacional, projeto conceitual e projeto preliminar. O resultado foi uma bancada de ensaios desenvolvida com baixo custo, grande versatilidade de aplicação e boa precisão perante os ensaios. Palavras-chave: Ensaio de laboratório, bancada de ensaio, semeadoras de precisão ABSTRACTThe objective of this work was to design and develop a test rig which first could be applied to test seed meters used in planters and to present adjustment features to further test other components of agricultural machinery. The design was based on a phase model methodology from which we used the following phases: informational design, conceptual design and embodiment design. The result was a test rig developed with low cost, excellent application versatility and good precision in the trials. Keywords: laboratory trial, test bench, planters INTRODUÇÃOEnsaiar, testar ou simular são etapas fundamentais na criação e validação de componentes ou sistemas mecânicos mais complexos, visando o entendimento ou o conhecimento de informações como: vida útil, pontos de desgaste ou fadiga, desempenho funcional ou adequação a normas. Segundo Alonço et al. (2010) os ensaios em laboratório são realizados com o auxílio de bancadas que reproduzem, artificialmente e de forma controlada, as condições operacionais sob as quais a máquina efetua a semeadura no campo. Jasper et al. (2009) verificaram que a utilização de bancadas simuladoras do processo de semeadura tem sido a ferramenta empregada por empresas produtoras de sementes e discos dosadores para indicar a melhor opção para cada lote de sementes.1 UFPel -Universidade Federal de Pelotas -Pelotas/RS -Brasil.

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“…Similar to the title of this paper, many authors are investigating seed distribution with different types sowing machines [15][16][17][18]. Also, the main problem of sowing is to determine longitudinal, lateral and depth seed distribution [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Partial Differential Equations for Cereal Seeds Distribution

Tomantschger

Tadić

2021

Teh. vjesn.

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During the recent years all crop species achieved the best possible field distribution so a high yield is to be expected. In this paper the solutions of two different diffusion equations are determined, which describe the optimal distribution of cereal grains over a field. Therefore, there are two different partial differential equations of cereal seed distribution-distinction is made between the longitudinal spacing (seeds in a row), and transverse distance (between two rows), as well as the sowing depth. In particular, closed forms of solutions are derived in each case. Although the result of the diffusion equation with respect to the distribution of the lateral seed distance of two adjacent rows is already known, a new solving method is presented in this paper. By this method, the partial differential equation is reduced to an ordinary one, which is easier to solve. In this paper it is shown that the distribution of lateral resp. longitudinal and in-depth wheat seed distances is achieved by a normal Gauss function resp. a log-normal function. Furthermore, it is demonstrated that the fitting functions of the best experimental results of wheat seeding distributions are particular solutions of the individual differential equations. Normal Gauss function describes lateral distribution with R 2 = 0.9325; RSME = 1.2450, and log-normal function describes longitudinal distribution with R 2 = 0.9380; RSME = 1.4696 as well as depth distribution with R 2 = 0.9225; RSME = 2.0187.

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Effect of different conductor tubes on the longitudinal distribution of corn seeds

Cited by 14 publications

References 11 publications

Influence of Seed Tube Curvature on Seed Longitudinal Distribution

Influence of Seed Tube Curvature on Seed Longitudinal Distribution

Projeto, desenvolvimento e construção de uma bancada de ensaios para dosadores de semente

Partial Differential Equations for Cereal Seeds Distribution

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