The migration mobility of Ca in freshly-limed (with a wide range of rates) soil was studied in the model experiment in columns. The experiment imitated the uneven placement of ameliorant in different parts of a field. It was found that repeated washing of the soil (12 washes), imitating the annual volume of precipitation seeping through the cultivated layer, contributed to the leaching of calcium from the soil. Calcium was found in all portions of the filtrate. During 12 washes, 10.44 mg of calcium was removed from the unlimed soil. In different liming treatments, migration losses increased with an increase of the ameliorant rate. With a 2-4-time increase in the lime rate, the amount of leached calcium increased 1.1-1.36 times. The absolute losses (mg) of calcium in all the different treatments were: 0.5 dose of lime - 16.46 mg; 0.75 doses - 14.67 mg; full dose - 22.87 mg; 1.5 doses - 23.57 mg; two doses - 31.09 mg; three doses - 26.55 mg; four doses - 31.1 mg. The dynamics of calcium leaching in all the stud