2016
DOI: 10.1590/1809-4430-eng.agric.v36n5p928-937/2016
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Broadcast distribution uniformity of fertilizer with centrifugal spreaders used in variable rate application

Abstract: The quality of fertilizer distribution process is important to the success of agriculture. This research aimed to study the distribution uniformity of fertilizers with spreaders capable of performing variable rate. Evaluations were carried out in different farms, in the Southwest region of the State of Goiás, Brazil. 13 longitudinal and transversal distribution profiles with 11 centrifugal spreaders were evaluated: five with limestone, two with gypsum, two with magnesium oxide, one with monoammonium phosphate … Show more

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Cited by 8 publications
(3 citation statements)
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References 6 publications
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“…Table 6 showed the uniformity spread measured by the coefficient of variation of uniformity. Good spread uniformity requires that the coefficient of variation should be less than 8.0% 2 , however, other reports considered CVs up to 20% as satisfactory for granular fertilizers 25 . Poultry droppings have the least ------------------------------------…”
Section: Uniformity Of Spreadmentioning
confidence: 99%
“…Table 6 showed the uniformity spread measured by the coefficient of variation of uniformity. Good spread uniformity requires that the coefficient of variation should be less than 8.0% 2 , however, other reports considered CVs up to 20% as satisfactory for granular fertilizers 25 . Poultry droppings have the least ------------------------------------…”
Section: Uniformity Of Spreadmentioning
confidence: 99%
“…The distribution mechanism of centrifugal spreaders relies on discs that makes a radial distribution of the material on the ground. This system configuration causes an uneven material distribution over an area making necessary constant evaluation and calibration of the system (Cunha & Filho, 2016).…”
Section: Introductionmentioning
confidence: 99%
“…Esse resultado era esperado visto que, normalmente, os trabalhos científicos são feitos em laboratório, pistas ou em condições extremamente controladas e por isso, avaliações em condições de campo, tendem a apresentar maior variabilidade (ABBOU-OU-CHERIF et al, 2017). De forma geral, trabalhos feitos em diferentes condições operacionais e ambientais apresentam grande amplitude de resultados, principalmente quando utilizando-se calcário muito seco (ALMEIDA, 2018) e em presença de vento (CUNHA;SOARES, 2016;SILVEIRA et al, 2017). A análise dos dados obtidos neste experimento e mostrados no Gráfico 4 demonstram que houve diferença significativa entre os tipos de máquinas avaliados para a variável CV.…”
Section: Máquinas Para Aplicação De Calcáriounclassified