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	Provedor de dados REA (1) AGRIAMBI (1) Autor Conceição,Fagner G. da (2) Barros,Murilo M. de (1) Corrêa Júnior,Delorme (1) Model,Kathleen J. (1) Paloschi,Cristiane L. (1) Remor,Marcelo B. (1) Ribeiro,Luiz F. (1) Rosa,Danielle M. (1) Sampaio,Silvio C. (1) Silva,Fabio M. da (1) Volpato,Carlos E. S. (1) Mais... Palavra-chave Agricultural frontier (1) Application at variable doses (1) Coffee production (1) Heavy metal (1) Precision agriculture (1) Trace elements (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2018 (1) 2016 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última MERCURY IN THE SEDIMENT OF THE UPPER PARNAÍBA RIVER REA Remor,Marcelo B.; Sampaio,Silvio C.; Rosa,Danielle M.; Model,Kathleen J.; Paloschi,Cristiane L.; Conceição,Fagner G. da. ABSTRACT The contamination of aquatic environments with chemical trace elements can be evaluated by their accumulation in sediments of the water body. Studies on mercury require the use of exclusive extraction techniques that have relatively high costs when compared to the analysis of other trace elements. This study was conducted aiming at determining the mercury concentration in sediments of the Upper Parnaíba River basin, located in a region of agricultural expansion between the states of Piauí and Maranhão. The sediment was collected at 12 sites in the basin. After drying, the quantification of total mercury was performed by the Zeeman atomic absorption spectrometry coupled to a pyrolysis reactor. Mercury concentrations in sediments of the Parnaíba... Tipo: Info:eu-repo/semantics/article Palavras-chave: Trace elements; Agricultural frontier; Heavy metal. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000500760 Performance of a variable-rate distribution system for simultaneous fertilizer application AGRIAMBI Barros,Murilo M. de; Volpato,Carlos E. S.; Silva,Fabio M. da; Conceição,Fagner G. da; Corrêa Júnior,Delorme; Ribeiro,Luiz F.. ABSTRACT The 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... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffee production; Precision agriculture; Application at variable doses. Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000200188 Registros recuperados: 2 Primeira ... 1 ... Última

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