Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/109124
Type: Artigo de periódico
Title: Coffee Crop Management Zone Delimitation Using Chlorophyll Index And Leaf Analysis [geração De Zonas De Manejo Para Cafeicultura Empregando-se Sensor Spad E Análise Foliar]
Author: Rodrigues Jr. F.A.
Vieira L.B.
de Queiroz D.M.
Santos N.T.
Abstract: The objective of this work was to define management zones for fertilizer application in coffee crop by using the K-means and the Fuzzy C-Means methods. The data used to define management zones were the chlorophyll index measured by SPAD sensor and the nutritional coffee leaf analysis performed in laboratory. The study was conducted in Jatoba Farm, located in Paula Candido, Minas Gerais state, Brazil. The data was collected in November, 2007 when the coffee fruits were starting their development. The coffee variety was Coffea arabica Catuai, and the total analyzed area was 2.1 ha. The management zones were generated using different set of data: the SPAD values; the N, P and K leaf concentrations; the N and Ca leaf concentrations; the N, Zn and B leaf concentrations; the N, P, K, Ca and S leaf concentrations; and the N, Ca and S leaf concentrations. The management zones generated by using K-means and Fuzzy C-Means did not present difference in management zone delimitation. The management zones defined by using the SPAD values were different from the ones generated by using leaf analysis.
Editor: 
Rights: aberto
Identifier DOI: 10.1590/S1415-43662011000800003
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-79961062138&partnerID=40&md5=aedbf9332e1b5d82c070c6d2cf08c40f
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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