Cronos 15 is a natural product based on humic acids extracted from North Dakota Leonardite, specifically designed to replenish the fertility of the soil and improve its characteristics. Humic acids are important compounds that create bonds with soil nutrients, improving their availability to the plant. They have a complex, stable chemical structure resulting in positive effects on soil fertility over the long term. Cronos 15 provides organic Nitrogen and an appreciable amount of meso- and microelements in a form available to crops, which stimulate the plants’ metabolic processes. In conclusion, the application of Cronos 15 improves the physicochemical properties of agricultural soils, making them more fertile.