EN
The research conducted shows that along with the decrease of the diameters of fractions, the total content of Mg increases and the leaching process of the soils investigated visibly decreases the content of this element in almost all fractions investigated. In addition, a considerably higher total content of Mg in the boulder loam than in old-alluvial sediment of the fractions was observed. In average separate fractions, the following amounts of total Mg accumulate: sand (1-0.1 mm) 5.6 to 7.3%, silt (0.1-0.02 mm) 7.3 to 13.3%, fractions of silt- clays (0.02-0.002 mm) 52.2 to 54.1% and clay fraction (<0.002 mm) 25.3 to 34.9%.