<p>Algunas características de materiales geológicos y suelos salinos en la zona occidental de la Hoya de Huesca</p>

Abstract

The aim of this paper is to contribute to the knowledge of saline soils and geological materials in the western sector of the Hoya de Huesca region. To this end, 11 unique areas were selected for their saline characteristics and the presence of halophilic vegetation. Surface soil samples were taken at different depths (0-30, 30-60 and 60-90 centimeters) depending on the characteristics of the soil, obtaining 28 samples. In the laboratory, the soil saturation extract was obtained and 1 : 2.5 and 1 : 5 soil :water tests were carried out. In the former, electrical conductivity (EC), pH, and ion concentrations (CO3²–, HCO3–, SO3²–, NO3–, Cl–, Ca²+, Mg²+, Na+ and K+) were determined and the sodium adsorption ratio (SAR) was determined. The results were analysed using graphical and statistical tools, including Piper diagrams, principal component analysis, histograms and scatter plots, to identify the predominant salts in the soils and materials studied. The samples were classified according to their EC and SAR, highlighting the presence of saline-sodic, sodic and saline soils. The degree of salinity of the soils is considered as ‘very strongly saline’ according to the FAO. The data from Modrán, in the municipality of Biscarrués, are notable as being of the Solonetz type.