Common liming agents include calcium- and magnesium-rich materials in various forms, including marl, chalk, limestone, burnt lime or hydrated lime. Liming often improves plant growth and increases the activity of soil bacteria, but oversupply may result in harm to plant life. Liming can also improve aggregate stability on clay soils. For this purpose structure lime, products containing calcium oxide (CaO) or hydroxide (Ca(OH)2) in mixes with calcium carbonate (CaCO3), are often used. Structure liming can reduce losses of clay and nutrients from soil aggregates.

limed soil

Soil which has been amended with mineral additives to increase its pH.