Soil survey using geostatistics in an agricultural experimental area in Petrolina, Pernambuco state, Brazil

  • Kátia Araújo da Silva Federal University of Sao Francisco Valley
  • Marcos Sales Rodrigues Universidade Federal do Vale do São Francisco http://orcid.org/0000-0002-6567-1273
  • Jailson Cavalcante Cunha Universidade Federal do Vale do São Francisco
  • David Castro Alves Universidade Federal do Vale do São Francisco
  • Helder Ribeiro Freitas Universidade Federal do Vale do São Francisco
  • Augusto Miguel Nascimento Lima Universidade Federal do Vale do São Francisco

Abstract

Due to the importance of accurate information on soils for agricultural production, quantitative techniques to estimate classes and/or soil properties have been developed to increase these maps quality. This manuscript was developed to map soils of an agronomic experimental area using geostatistical tools to assist in the allocation and management of experiments. The study area is located in an agricultural experimental area of Federal University of São Francisco Valley, Petrolina County, Pernambuco state, Brazil. Mapping the agricultural area consisted of a soil profile and a sampling grid with 51 georeferenced points. At these points the soil samples were collected at 0-0.2 m and 0.4-0.6 m soil depths that corresponded to A and B soil horizons, respectively. Soil samples were evaluated for physical (soil texture) and chemical analysis. The spatial dependence of soil attributes was described using semivariograms and maps were interpolated by ordinary kriging. The results showed that the predominant soils in the area were Ultisol with a cohesive eutrophic horizon, Ultisol with a cohesive dystrophic horizon, and Ultisol with a sandy cohesive dystrophic horizon. The geostatistical proved to be an important tool supporting the ultra-detailed pedological mapping of the agricultural research area.

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Author Biographies

Kátia Araújo da Silva, Federal University of Sao Francisco Valley
Colegiado de Engenharia Agronômica
Marcos Sales Rodrigues, Universidade Federal do Vale do São Francisco
Colegiado de Engenharia Agronômica
Jailson Cavalcante Cunha, Universidade Federal do Vale do São Francisco
Colegiado de Pós-Graduação em Engenharia Agrícola
David Castro Alves, Universidade Federal do Vale do São Francisco
Colegiado de Engenharia Agronômica
Helder Ribeiro Freitas, Universidade Federal do Vale do São Francisco
Colegiado de Engenharia Agronômica
Augusto Miguel Nascimento Lima, Universidade Federal do Vale do São Francisco
Colegiado de Engenharia Agronômica
Published
06-04-2017
How to Cite
Silva, K., Rodrigues, M., Cunha, J., Alves, D., Freitas, H., & Lima, A. (2017). Soil survey using geostatistics in an agricultural experimental area in Petrolina, Pernambuco state, Brazil. Comunicata Scientiae, 8(1), 175-180. https://doi.org/10.14295/cs.v8i1.2646
Section
Scientific Note