Ali S. Varietal features of white mustard performance formation depending on sowing and mineral nutrition rates under the conditions of the northeastern Forest Steppe of Ukraine

The thesis reveals the varietal features of white mustard performance formation depending on sowing and mineral nutrition rates under the conditions of the northeastern Forest Steppe of Ukraine. A comprehensive study of the influence of seed sowing rates and mineral nutrition on morphological parameters, the formation of vegetative mass (raw and dry), photosynthetic activity, and individual performance of the plants of white mustard varieties has been conducted. Varietal features of crop formation and its quality (weight of 1000 seeds and oil content) depending on sowing and mineral nutrition rates have been revealed. The oil collection per unit area depending on varietal characteristics, seeding rates, and mineral fertilizers has been given. The results of the calculation of economic and energy efficiency of growing white mustard have been highlighted. The research results proved that under the conditions of the northeastern Forest Steppe of Ukraine on the typical deep medium loam black soil, the crops of Bila Pryntsesa and Oslava varieties provide the highest productivity of white mustard. To obtain the maximum yield and profit, the seed sowing rate of 1.5 million units/ha and the application of mineral fertilizers at the rate of N60P60K60 for the Bila Pryntsesa variety and N30P30K30 for the Oslava variety should be applied.