Due to the long-term use of the soil as a resource, the natural balance of microorganisms necessary for the normal functioning of the plant is disrupted. The trophic structure of agrophytocoenoses is unstable, the circulation of substances in them is incomplete, it requires regulation - fertilization to restore fertility. Mineral fertilizers as an important component of agriculture, which determines the yield and quality of products, are not fully absorbed by plants. The aim of the study was to study the effectiveness of a modified mineral fertilizer (nitroammophoski NPK = 17-17-17) by Bacillus subtilis H-13 bacteria, when cultivating carrots of the Abaco variety. The results of the effectiveness of biomineral fertilizers on salty light chestnut soil in combination with salts with a heavy granulometric composition, in the agrocoenosis of carrots in the conditions of the Volgograd Region are presented. The effect of biomineral fertilizer has shown a high effect and can be considered as a method of complex biologization of crop cultivation technology in agriculture of the Russian Federation. The essence of the reception is the processing of mineral fertilizer granules with a microbiological preparation BisolbiFit. This technique makes it possible to form stable agrobiogeocoenoses by improving the growth conditions, accelerating the development of plants. The use of biomodified mineral fertilizer, improving the mineral nutrition of plants, allowed to obtain an increase in the yield of carrots - 35,4%. It also helped to improve the quality of root crops - the sugar content increased by 35,2 mg/g of raw mass.