In the conditions of short-rotation crop rotations, the influence of fertilization systems and precursors on the nutrient regime of grey forestal soil under winter wheat and spring barley was investigated. It was established that the highest content of nutrients under winter wheat and spring barley is formed in the conditions of the traditional fertilization system. During the direct application of 40 t/ha of manure to winter wheat in combination with mineral fertilizers in a dose of N60Р90K90 in the phase of vegetation recovery of the crop in the arable layer of the grain crop rotation, the concentration of alkaline hydrolyzable nitrogen compounds was 13.51 mg kg-1 of soil, mobile forms of phosphorus and potassium were 14.20 and 12.00 mg kg-1 of soil. By the application under spring barley of the complex N60Р60К60 + byproducts of the precursor of winter wheat in the grain-forage and N60Р60К60 in the crop rotation in the seedling phase, 12.34-12.40 mg kg-1 of soil alkaline hydrolysis nitrogen was formed, 12.72-12.81 and 11 .28-11.44 mg kg-1 of the soil of mobile forms of phosphorus and potassium Higher values of mobile compounds of the main nutrients of plants under winter wheat are formed after the precursors meadow clover and peas. The lowest values are observed in repeated sowings: in the phase of recovery of crop vegetation on unfertilized variants in crop rotation with the predecessor of meadow clover the content of mobile forms of nitrogen, phosphorus and potassium amounted to 10.81, 10.93 and 9.71 mg kg-1 of soil, in grain with a predecessor of peas it was 10.72, 11.11 and 10.19 mg kg-1 of soil, in repeated sowings of winter wheat in grain rotation 10.19, 10.86 and 9.79 mg kg-1 of soil. Before the end of the vegetation season of winter wheat and spring barley, the content of nutrients decreased and equalized by the absolute intervariant values due to their use by plants for growth, development and crop formation. The use of organo-mineral fertilization systems ensured an increase in the level of provision of the soil environment with organic substances. Under the alternative fertilization system, the amount of by-products after meadow clover was 8.20-9.00 t/ha, corn for grain – 6.74 t/ha, winter wheat – 4.63-5.25 t/ha, and with growing it in repeated crops – 5.06-5.27 t/ha. Potatoes grown under an alternative fertilization system in crop rotation formed 2.43-2.56 t/ha, and buckwheat – 2.86 t/ha of by-products. Under the traditional fertilization system, this indicator was the highest among all cultivated crops.