Sapropel is a mineral humus, formed over many years in the bottom of freshwater reservoirs from plants, dead microorganisms and soil, enriched with mineral substances such as nitrogen, phosphorus, iron, manganese, etc.
The composition of the sapropel is largely dependent on the reservoir where it is mined. Sapropel has a positive effect on the soil and is widely used as a fertilizer. It has several advantages over other fertilizers, for example peat, as It contains more nutrients and micronutrients.