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The content of total, exchangeable and soluble (in 20% HCl) magnesium in soils and parent materials increased as increased the fractions content of soils fractions smaller than 0.02 mm. Significantly higher content of magnesium soluble in 20% HCl was found in than soil fractions than in sand and silt fractions. In soil fractions smaller than 0.02 mm more than 60% of soluble magnesium was found.
The total and soluble (in 20% HCl) magnesium content is positively corelated with content of soil particles smaller than 0.02 mm. The lower level of magnesium content in humus horizons resulted from signifceatly lower Mg content in 1 g of soil fractions smaller than 0.02 mm.
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