Liming (soil)
Application of minerals to soil / From Wikipedia, the free encyclopedia
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Liming is the application of calcium- (Ca) and magnesium (Mg)-rich materials in various forms, including marl, chalk, limestone, burnt lime or hydrated lime to soil.[1] In acid soils, these materials react as a base and neutralize soil acidity. This often improves plant growth and increases the activity of soil bacteria,[1] but oversupply may result in harm to plant life. Modern liming was preceded by marling, a process of spreading raw chalk and lime debris across soil, in an attempt to modify pH or aggregate size.[2] Evidence of these practices dates to the 1200's and the earliest examples are taken from the modern British Isles.[2]