Sodium-affected alfisols of the agreste region, state of Paraíba, Brazil, as known by potter-farmers and agronomists

  • Ângelo Giuseppe Chaves Alves UFRPE; Depto. de Biologia
  • Ivandro de França da Silva UFPB; CCA
  • Sandra Barreto de Queiroz UFPB; CCA
  • Mateus Rosas Ribeiro UFRPE; Depto. de Agronomia
Keywords: ethnopedology, discriminant-canonical analysis, pottery, local knowledge

Abstract

Decisions and practical attitudes of land use and management adopted by rural populations are, to a great extent, based on local soil knowledge. This study was performed to describe and analyze chemical, physical and morphological characteristics of sodium-affected Alfisols employed in traditional pottery; and to compare, through statistical analysis, pedogenetical horizons and soil layers, as recognized in soil profiles by professional researchers and potter-farmers, respectively. Fieldwork was performed in Chã da Pia, a rural village in the municipality of Areia, in the Agreste region of the State of Paraíba, Northeast Brazil. Ethnoscientific techniques were used to describe and analyze soil knowledge of potter-farmers who played the role of informants. A comparison of soil categories recognized by farmers and researchers was performed through discriminant-canonical analysis. Soils from which local people obtain a material named "barro de loiça" (pottery clay) were classified as Typic Natraqualf and Vertic Albaqualf, according to Soil Taxonomy. Potter-farmers were able to identify differences between the tillable topsoil and underlying layers from which they extract ceramic clay. Some soil layers, recognized by potter-farmers, were similar to pedogenetic horizons of the same soils, recognized by researchers, in terms of physical, chemical and morphological characteristics. Discriminant-canonical analysis was a useful tool to articulate and compare information related to soil knowledge held by distinct social groups.

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Published
2007-10-01
How to Cite
Alves, Ângelo, Silva, I., Queiroz, S., & Ribeiro, M. (2007). Sodium-affected alfisols of the agreste region, state of Paraíba, Brazil, as known by potter-farmers and agronomists . Scientia Agricola, 64(5), 495-505. https://doi.org/10.1590/S0103-90162007000500007
Section
Soils and Plant Nutrition