| Summary: | The study has been undertaken in order to determine the influence of different substances (manure, clay, charcoal, zeolite and calcium oxide) on soil pH, hydrolytic acidity, total exchangeable bases, cation exchange capacity, the base saturation of soil contaminated with cobalt (0, 20, 40, 80, 160, 320 mg·kg−1 of soil). The analysed properties of soil proved to be dependent on the cobalt contamination and the kind of substances. In the series without substances soil contamination with the highest doses of cobalt raised the soil’s hydrolytic acidity but depressed its pH, total exchangeable bases and base saturation. Among the substances applied to soil in order to neutralize the effect of contamination with cobalt, calcium oxide had the strongest influence on the soil’s properties. In the series with calcium oxide application the hydrolytic acidity was decreased and other soil properties were increased. Manure addition to soil had positive but weaker effect on analysed soil properties.
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