This study was carried out at the Experimental Station "La Poveda" in Arganda del Rey (Madrid), with the following geographical coordinates: latitude 40º 19' N; longitude 3º 19' W Gr; and altitude 550 m. The main objective was to study the spatial variability of chemical and physical properties of a Typic Xerofluvent under three cultivation systems. Sampling for the study of spatial variability was performed according to an appropriate geo-statistical analysis in two directions. Spatial variability was observed with respect to organic matter content in the three systems studied. The reach was set at 3 m in the barley system and 2 m for the vetch-oat/sunflower and prairie/vetch-oat systems. Physical properties studied presented less variability than chemical properties, with the exception of coarse sand content in the barley system. Organic matter content in the prairie/vetch-oat system had the smallest variability.
organic matter; geoestatistics; semivariogram