Models for predicting the performance of fertilizer metering in seed cum fertilizer drill

Abstract

This study aimed to establish mathematical models that predict the performance of helical fertilizer metering according to the longitudinal and transverse inclinations, angular speed, and helical pitch. Laboratory tests were carried out with helical meterings with lateral and longitudinal discharge through overflow and with two helicoids, working at an angular speed of 16 and 46 rpm at the following longitudinal inclination angles: -20, -15, -10, -5, 0, +5, +10, +15, and +20° and on the transverse axis: -15, -10, -5, 0, +5, +10, and +15°. It was found that the variation of the transverse inclination has little effect on the dosage. When using fertilizer metering with a helicoid, the higher the longitudinal inclination, the greater the dosage in a linear manner, while the meterings with two helicoids provided less oscillation of the dosages according to the inclinations.

Fertilizer deposition as a function of angular velocity and inclination of the helical dosing mechanism

“…Granular fertilizer distribution at the reference of 0° was acceptable at all studied velocities, which is an expected result because the granular fertilizer under these conditions does not present mechanical resistance relative to gravity. It can be explained by the higher variation rate at the extremities compared to that of the central region, evidencing a higher flow gradient with an increase in inclinations (Spagnolo et al, 2021).…”

“…The current technological package involved in the manufacturing of metering mechanisms requires new methods of validating the distribution of granular fertilizers compared to the current ISO (1984) standard methodology, which may not meet the assessment of distribution as a step in the industrial process. Several studies carried out with this method have shown differences regarding the velocity and inclination of the metering mechanisms (Franck et al, 2015;Reynaldo & Gamero, 2015;Dalacort & Stevan Junior, 2018;Spagnolo et al, 2021), in addition to new assessment methodologies (Rosa et al, 2019).…”

Distribution of granulated fertilizers in dispensers mounted with single and double helicoidal

“…Due to the large number of data collected in this process, there is a demand for more efficient and accurate assessments through statistical process control (DURAN-VILLALOBOS et al, 2020). In addition to this tool, the elaborated histogram represents the fertilizer deposition samples in class intervals and evaluates their behavior based on the arrangement of events (MELO et al, 2019), according to SPAGNOLO (2020).…”

Avaliação de sistemas mecanizados para aplicação de calcário em plantios de eucalipto de áreas montanhosas

“…As configurações dos discos (KHUDHER; HIMOUD; ALMALIKI, 2020a; KIM; WOO; KIM, 2018;SAGRILO et al, 2019;YANG et al, 2019;YILDIRIM;KARA, 2012), posicionamento (PRZYWARA et al, 2020;RAMON, 2003a) e abertura da alimentação de fertilizantes sobre o disco (COETZEE; LOMBARD, 2011;SHI et al, 2018). Também foram avaliados a velocidade de giro dos discos que interfere na balística de projeção das partículas e consequentemente no padrão de distribuição do insumo (ANDRADE et al, 2020;DINTWA et al, 2004;GANASCINI et al, 2016;OLIESLAGERS;DE BAERDEMAEKER, 1996), os tipos de dosadores (SPAGNOLO et al, 2021), as características dos fertilizantes utilizados (PETTERSEN;SVENDSEN;ØVLAND, 1991;YULE, 2011) O distribuidor pneumático é caracterizado por conter um sistema de turbina ou ventilador que produz fluxo e pressão de ar suficiente para a condução do insumo do reservatório até as pontas de aplicação (HIGGINS, 2003;SRIVASTAVA et al, 2006).…”

“…A aplicação de fertilizantes e corretivos em terrenos inclinados é pouco estudada já que as culturas agrícolas são principalmente cultivadas em terrenos planos e levemente ondulados (BARROS et al, 2019;GODOY;LOPES-ASSAD, 2002). Nos poucos trabalhos existentes (ABBOU- OU-CHERIF et al, 2017;SPAGNOLO et al, 2021) 2016). Nestes equipamentos, diversos fatores que afetam a qualidade da aplicação tem sido intensamente estudados (ANDRADE et al, 2020;KHUDHER;HIMOUD;ALMALIKI, 2020;KIM;WOO;KIM, 2018;LAGHARI et al, 2014;SAGRILO et al, 2019;SPAGNOLO et al, 2021;WERNER et al, 2007), porém, a aplicação de produtos em pó é um assunto que carece de mais estudos, já que a aplicação de corretivos de acidez do solo ou fertilizantes em pó, não é uma prática comum em todos os países.…”