African Journal of
Environmental Science and Technology

  • Abbreviation: Afr. J. Environ. Sci. Technol.
  • Language: English
  • ISSN: 1996-0786
  • DOI: 10.5897/AJEST
  • Start Year: 2007
  • Published Articles: 883

Full Length Research Paper

Spatial analysis of soil physical attributes from a degraded area under different types of management

Joseane Carina Borges de Carvalho
  • Joseane Carina Borges de Carvalho
  • Secretaria da Educação do Estado de São Paulo. Praça da República nº 53, 01045-903, sala 20 (térreo), São Paulo, Brasil.
  • Google Scholar
Carlos Roberto Espindola
  • Carlos Roberto Espindola
  • Instituto de Geociências, Universidade Estadual de Campinas (UNICAMP). Rua João Pandiá Calógeras, nº 51, 13083-870, Cidade Universitária, Campinas, Brasil.
  • Google Scholar
Marlene Cristina Alves
  • Marlene Cristina Alves
  • Departamento de Fitossanidade, Engenharia Rural e Solos, Universidade Estadual Paulista (UNESP). Rua Monção, nº 830, 15385-000, Ilha Solteira, Brasil.
  • Google Scholar
Célia Regina Grego
  • Célia Regina Grego
  • Embrapa Informática Agropecuária. Av. André Tosello, nº 209, Campus da Unicamp, Barão Geraldo, Campinas, Brasil.
  • Google Scholar
Sidney Rosa Vieira
  • Sidney Rosa Vieira
  • Instituto Agronômico de Campinas (IAC), Caixa Postal nº 28, 13012-970, Campinas, Brasil.
  • Google Scholar


  •  Received: 24 November 2016
  •  Accepted: 26 July 2017
  •  Published: 30 September 2017

Abstract

The objective of this work was to analyze the spatial variability of soil aggregates, porosity and density under five different land-uses and management conditions (degraded substrate - SD; degraded substrate with sewage sludge and Eucalyptus crop - SDLE; soil under pasture SP; capoeira under regeneration - SR; and soil under cerrado - SC). Total porosity (m3.m-3) and density (Mg m-3) of the soil; the mean weight diameter (MWD, mm) of the aggregates; and the percentage of aggregates resistant to rainfall were evaluated. The date of soil was analyzed with descriptive statistics for initial exploration and geostatistics, to analyze the spatial variability. There was spatial dependency and the parameter adjust range varied from 8 to 12 m under the treatments SD and SR for the aggregates and SR for macroporosity, total porosity and soil density. There was spatial dependency also under SP, for the aggregates, microporosity, and total porosity; under SC, for the aggregates; and under SDLE, for microporosity. Soil data with spatial dependence in the field were characterized both by high and low values in the same area. Therefore it is not adequate to consider these areas as homogeneous for future experiments and agricultural activities.

Key words: Spatial variability, soil aggregates, geostatistics.