Sesame Hill Dropping Performance of a Vacuum Seeder for Different Tillage Practices

Topakçı, Mehmet; Karayel, Davut; Çanakcı, Murad; Furat, Şeymus; Uzun, Bülent

doi:10.13031/2013.36487

Cited by 12 publications

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“…Essa íntima relação entre CTC e MO devese ao fato de que a MO sofre desprotonação de seus grupamentos carboxílicos e fenólicos, aumentando a carga negativa e, deste modo, eleva a CTC mesmo em solos de baixa fertilidade. O aumento nos estoques de MO em plantio direto é suficiente para ocasionar aumento expressivo na CTC destes solos (CELIK;BOYDAS;ALTIKAL, 2011;CIOTTA et al, 2002;TOPAKCI et al 2011). Esse aumento é observado, principalmente, na camada de 0-0,05 m, uma vez que na camada de 0,05-0,15 m (Figura 3B), os teores de MO foram menores e a sua relação com a CTC também foi menos expressiva.…”

Section: Cpunclassified

“…Tal constância está alicerçada, principalmente, na necessidade de sustentabilidade, preservação ambiental, melhoria da qualidade de solos agrícolas e redução dos custos de produção. O sistema de plantio direto (SPD), por exemplo, é eficiente para o atendimento de tais exigências, proporcionando aumento de rendimento dos sistemas produtivos, quando comparado aos sistemas de preparo convencional (TOPAKCI et al, 2011).…”

Section: Introductionunclassified

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Variabilidade espacial de atributos químicos de um Latossolo Vermelho-Amarelo cultivado em plantio direto

Lima¹,

Silva²,

Silva³

2013

Rev. Ciênc. Agron.

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RESUMO-Objetivou-se avaliar a extensão e a intensidade da dependência espacial da fertilidade de um Latossolo Vermelho-Amarelo distrófico, cultivado sob plantio direto, utilizando, de forma conjunta, técnicas de geoestatística e estatística multivariada. O experimento foi conduzido em uma área cultivada com soja em plantio direto no município de Rio Verde-GO. O solo foi amostrado nas profundidades de 0-0,05 m e 0,05-0,15 m, em uma malha amostral com 44 pontos. Os atributos avaliados foram pH em CaCl 2 , Ca, Mg, Al, P, K, H+Al, CTC, SB, V e MO. Os dados foram analisados por meio da análise da estatística descritiva seguida de uma análise de componentes principais de forma a gerar componentes que expliquem a maior parte da variação dos atributos. A geoestatística foi utilizada para verificar a existência e quantificar o grau de dependência espacial utilizando os componentes principais. A matéria orgânica apresentou maior continuidade espacial devido às características do sistema de plantio direto. De maneira geral, a área apresentou baixa fertilidade para o cultivo da soja, como diferente padrão de distribuição espacial entre camadas. Palavras-chave: Geoestatística. Solo-manejo. Fertilidade do solo.

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Section: Cpunclassified

Section: Introductionunclassified

Variabilidade espacial de atributos químicos de um Latossolo Vermelho-Amarelo cultivado em plantio direto

Lima¹,

Silva²,

Silva³

2013

Rev. Ciênc. Agron.

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“…Existing mechanical metering devices cannot meet its precision seeding agronomic requirements, and damaged seeds are a serious problem. Compared with mechanical seeders, those using vacuum principle are widely used because they have the advantages of more precise seeding quality, lower rate of seeds damage, and broader spectrum of applicability [7][8][9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Simulation and experiment on prediction of total rice seeds mass in vibrating tray for vacuum plate seeder

Zhan¹,

Jin²,

Tian³

et al. 2019

International Journal of Agricultural and Biological Engineering

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To improve the seeds pickup precision of a vacuum plate seeder, it is important to accurately control the relative distance between suction plate and seeds layer in vibrating tray. Under the excitation of reciprocating vibration with a time varying interference in direction angle, the seeds motion is simulated using the discrete element method (DEM). By analyzing the seeds distribution characteristics, it was found that the seeds-mass-per-unit-area (SMA) was approximately plane distributed in the tray. Then, four square areas on the bottom of rectangular tray were divided symmetrically near the four vertices to measure the corresponding SMA respectively, and a monitoring plane model was established to predict the average SMA and total seeds mass in the tray. The prediction results of DEM simulation showed that the maximum and the mean relative errors were 6.75% and 2.85%. The influences of the normal vector of monitoring plane model and the standard deviation of SMA in four monitoring areas on the prediction errors were analyzed. A method for improving prediction accuracy by using linear regression correction was proposed, and the maximum and the mean relative errors could be reduced to 5.01% and 2.07%. When the tray was vibrated with the frequency of 11 Hz and the amplitude of 4 mm, experiments were carried out on the vacuum plate seeder test-rig. A Kalman filter was adopted to suppress the SMA measurement noise in four monitoring areas. Prediction results indicated that the maximum and the mean relative errors were 10.2% and 3.46% with the average SMA in range of 0.9-1.5 g/cm 2 , respectively. The paper can provide a basis for further study on the automatic control of suction plate motion according to the variation of seeds mass in the tray.

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“…The shape of the rice seed is irregular with frangible glume on the surface. Vacuum seeders are widely used for rice precision seeding because they have many advantages compared with mechanical seeders such as more precise seeding quality, a lower rate of seed damage, better control and adjustment, and a broader spectrum of applicability [ 4 , 5 , 6 , 7 ]. As a kind of rice precision seeding equipment especially used in the nursery process, a vacuum plate seeder is primarily composed of a suction plate and a seed tray [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Monitoring Method of Total Seed Mass in a Vibrating Tray Using Artificial Neural Network

Zhao

Qin

Tian

et al. 2018

Sensors

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To maintain the continuous working performance of a vacuum plate seeder, it is important to monitor the total seed mass in the seed tray in real time and accurately control the pickup position of the suction plate accordingly. Under the excitation of reciprocating vibration varying with time and interference by direction angle, the motion of seeds in a rectangular tray was simulated using the discrete element method (DEM). A measurement method for seed mass in a small area was proposed based on the impulse theorem. The impact force of seeds was monitored with a cantilever force sensor, and the corresponding signal processing circuit was designed. Calibration results indicated that the relative nonlinear error was less than 2.3% with an average seeds-mass-per-unit-area (SMA) of 0.3–2.4 g/cm2. Then, four sets of force sensors were installed symmetrically near the four corners of the vibrating tray which were used to measure the SMA respectively. Back propagation (BP) neural networks which take four SMA measurement results as input parameters were developed to monitor the total seed mass in the tray. Monitoring results using DEM simulation data showed that the general relative error was 3.0%. Experiments were carried out on a test-rig and the results validated that the relative error was reduced to 5.0% by using the BP neural network method.

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Sesame Hill Dropping Performance of a Vacuum Seeder for Different Tillage Practices

Cited by 12 publications

References 0 publications

Variabilidade espacial de atributos químicos de um Latossolo Vermelho-Amarelo cultivado em plantio direto

Variabilidade espacial de atributos químicos de um Latossolo Vermelho-Amarelo cultivado em plantio direto

Simulation and experiment on prediction of total rice seeds mass in vibrating tray for vacuum plate seeder

Monitoring Method of Total Seed Mass in a Vibrating Tray Using Artificial Neural Network

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