Whether carbonate or quicklime is added to the earth, depends on the type of soil.
Carbonate of Lime, also called lime marl, can be safely applied to all types of soil, without causing damage. Quicklime has a significantly sharper effect than carbonate of lime and is therefore only suitable for heavy clay soils. It is usually traded as ground quicklime. Since the quicklime attracts water and thus heats up considerably, it may only be stored outdoors. is better, to buy it in the fall and bury it immediately.