Abstract
Regularities of spatial variability of the structural state of soils in rainfed and irrigated regions of Azerbaijan are discussed with application of classical statistics and geostatistics. The highest coefficient of variation is observed for water-stable aggregates >3 mm (106 %), and the lowest – for 10-0.25 mm (7.9 %). The results of geostatistical analysis show a strong spatial dependence of the indicators of wet sieving at irrigation. Structural indicators are mainly approximated by spherical and exponential models in irrigated soils, but in rainfed conditions, by linear models.
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