African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6578

Full Length Research Paper

Impact of extractive industry on an agricultural soil in San Luis Potosí, México

Juan Carlos Rodríguez Ortiz1, Jorge Alonso Alcalá Jáuregui1*, Catarina Loredo Osti1, Humberto Rodríguez Fuentes2, J. Jesús Tapia Goné1 and Alejandra Hernández Montoya1
1Faculty of Agronomy, Autonomous University of San Luis Potosi, Km 14.5 Carr, San Luis-Matehuala, Soledad de Graciano Sánchez, S.L.P. México. 2Faculty of Agronomy, Autonomous University of Nuevo León, Km 7.5 Carr.Zuazua-Marín, Marín, N. L. México.
Email: [email protected]

  •  Accepted: 03 May 2012
  •  Published: 05 October 2012

Abstract

This case study arose from the opening of an ordinary civil trial, brought by a farmer against a company in the extractive industry sector. The judge required an investigation of: 1) whether the plot of the producer contained waste materials; 2) if there were chemical residues present; 3) the nature of such residues; 4) whether the plot was suitable for agriculture; 5) what were the factors which made the soil unsuitable; and 6) the degree of erosion. 65% (1.63 ha) of the property was affected by industrial spills, mainly due to the high proportion of gravel at the surface (90%), calcium carbonate equivalent (62%), reduction of organic matter (1.85 to 1.25%) and excessive erosion (19.44 t ha-1). The rest of the plot (0.87 ha) was not affected by these parameters. Both sites were not affected as regards heavy metals and  metalloids pollution, abnormal pH and electrical conductivity.

 

Key words: Heavy metals, calcium carbonate, gravel.