According to the results of studies, conducted in the conditions of the Northern Steppe of Ukraine in 2016–2019, it was revealed that on the biological productivity of winter wheat influenced both the density of the productive stems and the productivity of the ear. The maximum crop yield after predecessors fallow and spring barley was noted when sowing at the optimum time (September, 22). It should be noted the greatest plasticity of soft winter wheat of variety Golubka Odes’ka relatively to its predecessor and sowing time. In the durum winter wheat of variety Burshtyn after both predecessors the number of grains per ear and the weight of grains per ear were less than in soft winter wheat varieties; a significant decrease in crop yield of this variety was observed when sowing at late time.