Fractal features of soil texture and physical attributes in indian dark earth under different uses in Western Amazon


  • Half Weinberg Corrêa Jordão Universidade Estadual Paulista
  • Milton César Costa Campos Universidade Federal da Paraíba
  • José Maurício da Cunha Universidade Federal do Amazonas
  • Ivanildo Amorim de Oliveira nstituto Federal de Rondônia
  • Laércio Santos Silva Universidade Estadual Paulista
  • Elilson Gomes de Brito Filho Universidade Federal do Amazonas
  • Bruno Campos Mantovanelli Universidade Federal de Santa Maria
  • Ludmila de Freitas Instituto Federal de Rondônia
  • Romário Pimenta Gomes Universidade Estadual Paulista



Fractal dimension., Soil physics., Soil use.


Studying particle size distribution is important to understand soil structure and formation processes. This research aimed to assess the fractal dimension of soil texture in Indian Dark Earth (IDE) areas in southern Amazonas state under different land uses, as follows: two areas in the municipality of Apuí, one growing cocoa and the other coffee; a grassland area in the municipality of Manicoré; and a forest area in the municipality of Novo Aripuanã. A sampling grid containing 88 collection points (intersecting points on the grid) was established in each area, measuring 80 x 42 m for the cocoa and coffee-growing sites, and 80 x 56 m and 60 x 42 m for the grassland and forest areas, respectively. Soil samples were collected in soil core and as clumps at a depth of 0.0-0.20m to determine the structural physical properties and texture of the soil. The following physical attributes were assessed: texture (PSD), bulk density (BD), macroporosity (Macro), microporosity (Micro), total porosity (TP) and aggregate stability (GMD and WMD). The fractal dimension (D) of the soil texture was determined, followed by analysis of variance and comparison of the means using Tukey’s test (p≤0.05). Pearson’s correlation was applied to assess the correlation between variables. There was a significant difference between the IDEs studied, with a higher D value in the cocoa-growing area in relation to the other sites. Additionally, the larger the clay fraction, the higher the D value. Fractal dimension (D) showed a positive correlation with sand, clay, BD, Macro, GMD and WMD, and a negative correlation with silt, micro, TP. Based on the D values obtained, the ADE cultivated with cocoa showed superior quality in relation to the other areas studied.


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How to Cite

JORDÃO, H.W.C., CAMPOS, M.C.C.., CUNHA, J.M. da, OLIVEIRA, I.A. de, SILVA, L.S., BRITO FILHO, E.G. de, MANTOVANELLI, B.C., FREITAS, L. de and GOMES, R.P., 2020. Fractal features of soil texture and physical attributes in indian dark earth under different uses in Western Amazon. Bioscience Journal [online], vol. 36, no. 6, pp. 1961–1974. [Accessed5 March 2024]. DOI 10.14393/BJ-v36n6a2020-47894. Available from:



Agricultural Sciences