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      Classificação numérica e modelo digital de elevação na caracterização espacial de atributos dos solos Translated title: Numerical classification and digital elevation model to spatial characterization of soil attributes

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          Abstract

          Uma das necessidades da agricultura moderna é a predição da variabilidade espacial dos atributos dos solos em escalas mais detalhadas, visando o gerenciamento sustentável e a otimização das práticas de manejo dos solos. Associada ao conhecimento da variabilidade dos atributos do solo e ao mapeamento das formas do relevo, a modelagem matemática tem auxiliado no planejamento agrícola. Objetivou-se então, no presente trabalho, caracterizar a variabilidade espacial de atributos físicos e químicos de Latossolo e Argissolo utilizando-se a classificação numérica e o modelo digital de elevação em duas áreas, identificadas por duas pedoformas distintas: pela convexa, para o Latossolo (158 ha) e por meio da linear, para o Argissolo (172 ha). Foram retiradas 53 amostras no Latossolo e 57 amostras no Argissolo e realizada análise multivariada de agrupamentos dos atributos estudados a partir de suas distâncias euclidianas. Esta análise caracterizou, por meio de dendogramas e juntamente com os modelos digitais de elevação para os diferentes solos, grupos mais homogêneos em Argissolo e menos homogêneos para o Latossolo em pedoforma convexa. Esses métodos quantitativos mostraram que as pedoformas condicionaram o padrão espacial dos atributos dos solos.

          Translated abstract

          One of needs of modern agriculture is the prediction of spatial variability of soil properties at more detailed scales for sustainable management and optimization of management practices. The mathematical model associated with knowledge of variability of soil attributes and mapping of relief forms has helped in agricultural planning. In this regard the aim of this study was to characterize the spatial variability of physical and chemical properties of Oxisols and Ultisols using numerical classification and the digital elevation model. Two distinct landforms: convex for the Oxisol (158 ha) and linear for the Ultisol (172 ha). 53 samples from the Oxisol and 57 samples from the Ultisol were taken. Multivariate analysis of clusters of attributes studied from their euclidean distances was performed. This analysis by dendograms along with digital elevation models for different soils characterized was more homogeneous in Ultisol groups, and less homogeneous for the Oxisol in convex landform. These quantitative methods showed that the landforms conditioned the spatial pattern of soil attributes.

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          Most cited references65

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          Soil Attribute Prediction Using Terrain Analysis

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            Análise Multivariada de dados

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              Further results on prediction of soil properties from terrain attributes: heterotopic cokriging and regression-kriging

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                Author and article information

                Journal
                rbeaa
                Revista Brasileira de Engenharia Agrícola e Ambiental
                Rev. bras. eng. agríc. ambient.
                Departamento de Engenharia Agrícola - UFCG (Campina Grande, PB, Brazil )
                1415-4366
                1807-1929
                April 2012
                : 16
                : 4
                : 415-424
                Affiliations
                [01] Jaboticabal SP orgnameUNESP orgdiv1FCAV joaojrsilva@ 123456yahoo.com.br
                Article
                S1415-43662012000400012 S1415-4366(12)01600412
                89855c8b-3ddc-4b89-bd79-ebfa9d4f3791

                This work is licensed under a Creative Commons Attribution 4.0 International License.

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                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 65, Pages: 10
                Product

                SciELO Brazil

                Categories
                Gestão e Controle Ambiental

                agricultura precisão,análise multivariada,mapeamento híbrido,relação solo-paisagem,multivariate analysis,precision agriculture,hybrid mapping,soil-landscape relationships

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