Frequency, time of re-liming and the particle size distribution of liming material is an important factors in combating soil acidity and at the same time in minimizing losses of basic cations by leaching. Large particles of dolostone screening are considered as a ballast in soil, due to their low and slow solubility. The paper presents results of a long-term study of the reclamation properties and fertilizing value of dolostone particles different in size, from dumps stone processing screenings. In a 10-variant field experiment on Albic Retisol, light loamy granulometric composition, reclaimed with dolostone particles of sizes <0.25; 0.25–1; 1–3 and 3–5 mm at a dose of 8.4 t ha⁻¹, the dynamics of pH_KCl and hydrolytic acidity (Нy) was studied for 13 experimental years. Results showed that the studied dolostone fractions are a valuable calcareous material. The effect of particles <0.25 mm on a pH_KCl value was observed over 8 experimental years, while on the Hy index for13 experimental years. The effect of particles 0.25–1 and 1–3 mm lasted for 8 test years, afterward the soil pH and Hy values returned to the initial level. The effect of particles 3–5 mm on soil acidity lasted for 7 test years. Linear empirical dependences of changes in soil acidity indicators have been developed over the entire study period. The average rate of soil acidification was established in individual treatments of the experiment. Monitoring of the green mass of plants for 13 experimental years showed that the productivity of plants in the treatments with dolostone particles was not inferior to the productivity in the treatment with limestone flour (LF) applied in an equivalent amount. The use of a mixture of dolostone particles with a size of <0.25 mm; 0.25–1 mm and 1–3 mm at doses of 3, 4 and 6 Hy was not effective. On the contrary, the use of a fraction 3–5 mm in deliberately high doses opens the way for the creation of a long-acting ameliorant.