Co2 Emissions From Liming

Liming is used to reduce soil acidity and improve plant growth in managed systems, particularly agricultural lands and managed forests. Adding carbonates to soils in the form of lime (e.g., calcic limestone (CaCO3), or dolomite (CaMg(CO3)2) leads to CO2 emissions as the carbonate limes dissolve and release bicarbonate (2HCO3-), which evolves into CO2 and water (H2O).

Inventories can be developed using Tier 1, 2 or 3 approaches, with each successive Tier requiring more detail and resources than the previous one. It is good practice for countries to use higher tiers if CO2 emissions from liming are a key source category.

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