Winter wheat is demanding against predecessor plants. The main requirement for the predecessors is that the field is cleared of plants in time for cultivation and sowing, it is possible to clean the field from weeds, it is possible to collect and preserve moisture and, on the basis of this, to ensure the same level of output, the plants develop well in autumn . doing it will make it possible to have a good wintering and get a high yield. Black herring is the best predecessor for winter wheat in arid, dry regions. On irrigated and moisture-provided soils, winter wheat is planted with potatoes, annual cereals, corn for green fodder, alfalfa, rapeseed, sorghum, etc. they are good predecessors. The main requirement for the predecessors is that at least 30-45 days before the sowing of autumn crops, the field is free and can be fertilized and plowed. [2, pp194-195]