The aim of the paper was to recognise soil moisture variability and features its spatial distribution, as well as, to examine whether a different sampling number is reflected in the characteristics of soil moisture field. Measurements of topsoil (1-6 cm) moisture were made on the maize field. The data obtained from eight sets with various number and location of measurement points were analysed by means of statistical and geostatistical methods. Among the statistical parameters the mean values of soil moisture appeared a little sensitive to a change of number and arrangement of sampling, yet the parameters describing the scattering of values reacted more significantly. The spatial dependence of soil moisture values was stated, although the range of this dependence was related to sampling number (over 36 it oscillated between 4-6 m). The directional variograms calculated for sets contained different number and location of sampling created a differential picture of an isotropy of soil moisture on the object studied.