PROBABILITY OF PARTICLE-SIZE FRACTIONS OCCURRENCE IN DIFFERENT LANDFORMS

Authors

  • Julião Soares de Souza Lima
  • Samuel Assis Silva Universidade Federal do Espirito Santo - UFES. Departamento de Engenharia Rual.
  • Daniel Pena Pereira Instituto Federal do Triangulo Mineiro-IFTM
  • Marcelo Soares Altoé Universidade Federal do Espirito Santo - UFES

DOI:

https://doi.org/10.13083/reveng.v26i4.823

Keywords:

landform, relief, semivariogram

Abstract

Knowing the variation of particle-size fractions, considering the relief forms, contributes for understanding the variation of other soil attributes. This work aimed to study the spatial distribution of the probability of particle-size fractions occurrence (clay, silt, very fine sand, fine sand, coarse sand, and total sand) in a clayey Oxisol with predominance of concave and convex curvatures. A sampling grid with 94 sampling points in 33x33m spacing at a depth of 0–0.20 m was built using a GPS. The spatial analysis was performed through indicator kriging. The spherical model was fit for all soil fractions, with ranges varying from 130 m to 280 m. In the region of convex curvature, the clay fraction presented the highest probability of occurrence (0.75 to 1.00), whereas in the concave region the coarse sand and total sand fractions presented the highest probability of occurrence. The very fine sand fraction and the silt did not present pattern of distribution in relation to the dominant curvatures of the relief.

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Author Biographies

Julião Soares de Souza Lima

Eng. Agrícola (UFV). Mestre em Engenharia Agrícola (UNICAMP) e Doutorado em Ciências Florestais (UFV). prof. do Departamento de Engenharia Rural do CCA da UFES. Ministra aulas na graduação nas áreas de Motores e Mecanização agrícola; na Pós-graduação em Produção Vegetal ministra a disciplina Geoestatística Aplicada.

Samuel Assis Silva, Universidade Federal do Espirito Santo - UFES. Departamento de Engenharia Rual.

Engenheiro Agrônomo (UFES). Mestrado em Produção Vegetal (UFES). Doutorado em Engenharia Agrícola (UFV). Lotado no Departamento de Engenharia Rural. Ministra disciplinas na área de Mecanização Agrícola.

Daniel Pena Pereira, Instituto Federal do Triangulo Mineiro-IFTM

Engenheiro Agrônomo (UFV). Mestrado em Ciências Florestai (UFES). Doutorado em Produção Vegetal (UFES)

Marcelo Soares Altoé, Universidade Federal do Espirito Santo - UFES

Técnico em Mineralogia (IFES). Graduando em Agronomia (UFES).

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Published

2018-08-31

How to Cite

Lima, J. S. de S., Silva, S. A., Pereira, D. P., & Altoé, M. S. (2018). PROBABILITY OF PARTICLE-SIZE FRACTIONS OCCURRENCE IN DIFFERENT LANDFORMS. Engineering in Agriculture, 26(4), 352–359. https://doi.org/10.13083/reveng.v26i4.823

Issue

Vol. 26 No. 4 (2018)

Section

Water and environmental resources

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