InCalc BlackPower is made of lacustrine chalk with an amorphous structure. It contains admixtures of organic carbon and humic acids, including humic and fulvic acids. The raw material for the production of InCalc BlackPower fertilizer is the Lake Chalk deposits (type 07 a). It is a young and therefore the softest form of lime carbonate. The amorphous structure of calcium particles causes the chalk to have a much larger contact surface of calcium with the soil solution, therefore it is characterized by high reactivity, which makes it more useful in agriculture and horticulture from much older dolomites and rocky limestones. Regulation of soil pH begins immediately after application.