Sapropel the same as manure, compost and peat contains many biologically active substances and microelements. Sapropel differs with these substances being available for plants in natural form, balanced and has high levels of organic matter humification. Freshly extracted sapropel contains no weed seeds, while traditional forms of organic fertilizers such as poultry, pig and cattle dung (manure), as well as peat usually contain large number of weed seeds. Sapropel fertilizer does not have an adjustment period. Manure and other organic matter needs conducting long-term preparation (6-12 months) prior to applying to the soil. Humic acids of sapropel in contrast to peat humic acids have a higher nitrogen content (up to 7% versus 2-4% in peat humic acids) and hydrogen (up to 7% against 5,5-6%). Sapropel compared to other fertilizers has the highest content of nitrogen (n), facilitates its preservation and accumulation.