80% CaCO3 - calcium carbonate, 5% MgCO3 - magnesium carbonateIn sandy soils 10-150 g/m2.in clay soils 200-250 g/m2.Potatoes are fertilized when the shoots are 10 cm long, then 200 g/m2.When planting fruit trees, mix 4-5 kg/m2, when planting roses, deciduous trees should also be mixed with 4-5 kg/m2.Fertilize in autumn or early spring.For lawn 100g/m2, if the soil is acidic.