In this work basic aspects of geoestatístics were approached for spatial analysis of soil moisture data, with an emphasis on semivariogram analysis as a methodology for determination of spatial dependence. The objective consisted of moisture analysis under field conditions in Toledo, Paraná State, Brazil, in clayey soils, in depths of 15 and 30cm, under management systems of no tillage and conventional planting. The research site constituted of two areas of 14x14m. In each area of the experiment, sampling in a mesh of 64 spaced points of 2m took place. The data were used for analysis of moisture using the conventional gravimetric method. The data were analyzed through the classic statistics and geostatistics. The results indicated a low variation coefficient in all data collections, which indicates homogeneity of the data. The analysis of the semivariograms showed spatial dependence of the moisture variable as being moderate to weak. The reaches of spatial dependence were from 5.20 to 10.67m for the soil moisture. For this variable, the values are related with depth in both management systems, but the variabilities did not show this tendency.
semivariogram; geoestatístics; spatial dependence
