The present study was carried out in order to identify the spatial variability of the texture and particle density in a hydromorphic soil. A systematic sampling in a 100 m transect was done, parallel to a small river, with spacing between sampling points varying from 0.25 to 20 m, totaling 51 sample points. Classical statistical and geostatistical methods were used to identify size and structure of the variability. The sand fraction presented 48.95% as coefficient of variation, which characterizes high variability. Experimental semivariograms were fitted to spherical, Gauss and exponential models with ranges of 15.0, 49.5 and 14.5 m respectively for sand, clay and silt. It was not possible to adjust experimental semivariogram for particle density. The results, show that textural fractions are spatially dependent even in a transect parallel to a small river, subject to similar sedimentation.
semivariogram; geostatistics; soil formation; soil properties
