To improve the elements of winter wheat cultivation technology in order to reduce the loss of nutrients from the soil, research was conducted. The results presented in the article show the effectiveness of the use of mineral fertilizers with the application of a biological preparation to the granules. The influence of the method of applying a biological preparation based on Bacillus subtilis H -13 on urea granules was evaluated. The influence of bio mineral fertilizers on the dynamics of nitrogen accumulation by wheat plants is established. The results obtained are the scientific basis for the use of rhizospheric bacteria Bacillus subtilis H -13 as an effective strain for expanding the range of mineral fertilizers by creating bio modified forms and subsequent use in agricultural technologies.

The study was aimed at assessing the yield and quality of winter wheat grains inoculated with Beijerinckia fluminensis (Azotovit) and Paenibacillus mucilaginosus (Phosphatovit) in a three-year experiment on leached Chernozem in the forest-steppe zone of the Middle Volga region. The seeds of the plants were treated before sowing with microbiological fertilisers, both individually and together at a dose of 2 L/t. Bacteria Beijerinckia fluminensis and Paenibacillus mucilaginosus contained in fertilisers increased the resistance of plants to adverse conditions: seedling completeness increased by 5.4%, winter hardiness by 17.4%, and harvestability by 15.0%. The use of fertilisers led to an increase in the productivity of winter wheat grain to 32.4%. The technological parameters characterising the baking properties were improved: the content of crude gluten in the grain of winter wheat has increased to 29.1% at 75 GDI (gluten deformation index) units (I group (good) of gluten quality).

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.

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