When pHusion Calcitic Limestone is dissolved by water, the organic acid accelerates the reaction of releasing available Calcium and neutralizes the hydrogen (H+) ions in the soil. The Calcium Lignosulfonate and Lignosulfonic Acid convert the calcium in pHusion Calcitic Limestone into a more soluble form, readily available for plant uptake or pH adjustment. pHusion Calcitic Limestone addresses both the calcium needs of the plant, as well as the growing media pH. pHusion Calcitic Limestone will help achieve a uniform calcium profile throughout the soil.