Resumen
Theapparent electrical conductivity has been an attribute widely used in studiesof spatial variability, due to its high correlation with other soil attributesand because it is an attribute that represents the variability of an area in aquick, easy and low-cost way. The objective of this study was to evaluate therelationship between the spatial variability of apparent electricalconductivity with physicochemical attributes of an Eutrophic Red Oxisol locatedin Maracaju, state of Mato Grosso do Sul, Brazil, for determining specific soilmanagement zones. We analyzed apparent electrical conductivity attributes (ECa2, 7 and 15 kHz), contents of potassium, cation exchange capacity, clay, basesaturation and organic matter content. ECa was measured with the ProfilerEMP-400 crossing the entire area in 0.45 m spaced lines. Soil samples werecollected in the 0.000.20 m layer, with a total of 216 samples in an area of70 ha. Statistical and geostatistical analyses were performed by SAS and GS+software. The apparent electrical conductivity (ECa) was presented as animportant tool to identify specific management zones showing data variabilitybetween low and medium zones. The attributes that had higher correlation withapparent electrical conductivity were potassium and clay.