Changes in the content of mobile (plant-available) manganese compounds were traced in a long micro-field experiment with 10 treatments on a strongly acid sod-podzolic soil reclaimed by dolomite particles of various sizes. It was shown that liming resulted in a decrease of mobile manganese compounds concentration in the soil. Regardless of the treatment of the experiment, the maximum decrease in concentration was achieved in the first after-effect year and depended on the particle size and application rate. At a later time the increase of its concentration was traced. The effect of  dolomite particles <0.25, 0.25–1.0, 1.0–3.0 and 3.0–5.0 mm in a science based rate corresponding to 7.5 t/ha, continued at least 6–7 years, mixtures of fractions in rates corresponding to 3, 4 and 6 hydrolytic acidity and fractions of crumbs with a size of 3.0–5.0 mm in a rate of 5 hydrolytic acidity continued during the whole experimentation period (10 years). The cultivation of timothy in the 9 and 10 year of the experiment led to a decrease concentration of manganese in the soil for all treatments. Empirical models that can adequately describe the dynamics of available manganese content in the soil reclaimed by various particles of dolomite are developed. The rate of change of the studied index in the entire time interval of the experiment is calculated. The ranking of the studied fractions has been carried out according to their effect on the increase manganese concentration in the meliorated soil in a long after-effect.Key words: dynamics of content, mobile manganese, sod-podzolic light loamy soil, melioration, various fractions of dolomite.