01232naa a2200205 a 450000100080000000500110000800800410001910000260006024501000008626000090018630000140019550000700020952004950027970000150077470000210078970000200081070000170083070000190084777301600086614673342006-01-13       2004    bl uuuu     u00u1 u    #d1 aOLIVEIRA, M. C. N. de  aEstrutura de covariância Matérn no estudo da dependência espacial do teor de calcio no solo.  c2004  c1 CD-ROM.  aSeção: Estatística em Agronomia e Biologia (Seção da RBras).  aThe understanding of the spatial dependence of the properties of the soil becomes more and more required by researchers that attempt to improve the interpretation of the results of field experiments supplying subsidies for new researches at reduced costs.  The purpose of this paper was to evaluate the spatial dependence of the calcium content using the Matérn covariance function. The parameter estimates were obtained by maximum likelihood (ML) and restricted maximum likelihood (REML).1 aBARBIN, D.1 aMACEDO, J. R. de1 aSILVA, E. F. da1 aHISSA, H. R.1 aCAPECHE, C. L.  tIn: SIMPÓSIO NACIONAL DE PROBABILIDADE E ESTATÍSTICA, 16., 2004, Caxambu. Programa e resumos. Caxambu: Associação Brasileira de Estatística, 2004. 1p.