Performance of a variable-rate distribution system for simultaneous fertilizer application

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 t...

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Bibliographic Details
Main Authors: Murilo M. de Barros, Carlos E. S. Volpato, Fabio M. da Silva, Fagner G. da Conceição, Delorme Corrêa Júnior, Luiz F. Ribeiro
Format: Article
Language:English
Published: Universidade Federal de Campina Grande 2016-02-01
Series:Revista Brasileira de Engenharia Agrícola e Ambiental - Agriambi
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000200188&lng=en&tlng=en
Description
Summary: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 Scott-Knott test at p < 0.05. The application variation in the transversal deposition test with tarps was 1.59%. The variable-rate distribution system remained stable regarding the longitudinal deposition, regardless of any interaction.
ISSN:1807-1929