tuhkaaineksia
Tuhkaaineksia is a Finnish term meaning the substances that make up or are present in ash. The term is used across disciplines—agriculture, environmental science, archaeology, and material science—primarily to discuss the chemical composition and potential uses or hazards of ash produced by burning organic matter such as wood, peat, coal, or waste. The composition depends strongly on the source material and combustion conditions. Commonly detected constituents are alkali and alkaline earth oxides such as calcium oxide (CaO), potassium oxide (K2O), magnesium oxide (MgO), as well as calcium carbonate (CaCO3), silica (SiO2), and trace metals. Organic carbon content may be low in highly combusted ash.
In agricultural practice, ash can serve as a soil amendment, supplying calcium and potassium and raising soil
In archaeology and materials science, ash analysis (qualitative/quantitative) informs trade, fuel use, or censer residue interpretation,
Etymology: tuhka = ash; -aineksia forms plural of -aine, indicating substances or constituents.