Ischenko A. Perfection of growing technology elements of spring rape on seeds in condition chernozems south of Ukraine

The object of researches is the process of forming of productivity of rape of fervent depending on a sort, terms of sowing, norms of sowing of seeds, doses of mineral fertilizers and feature of their co-operation in the soil-climatic terms of south Steppe of Ukraine. The purpose of researches is establishment of basic constituents, forming of the highly productive sowing of rape of fervent, which would maximally use bioclimatic potential of south Steppe of Ukraine. Methods of researches - visual; measuring-gravimetric; laboratory; computation-comparative; mathematic-statistical. Results of researches - For a theory: First for the dry conditions terms of South Steppe of Ukraine the reaction of sorts of rape of fervent on terms sowing at different norms of sowing and dose of mineral fertilizers is set. Technology of growing of culture by optimization of co-operation of factors is improved "sort - term of sowing - norm of sowing", "sort - dose of fertilizers". Subsequent development of question of forming of elements of productivity of plants, productivity and quality of seeds was acquired, power and economic efficiency of growing of rape of fervent. For practice: The optimum terms of sowing and norm of sowing for the sorts of rape of fervent are definite. Sorts with the high reaction on the mineral fertilizers are exposed. Expedience and possibility of growing of rape of fervent in the dry conditions terms of south Steppe of Ukraine is set. The given technology, comparatively with existing, provided productivity at the level of 13,5, 15,6 and 14,8 ts/ha accordingly, the increase of harvest of seeds in the economies on the developed technology comparatively with the control made 4,4, 2,4 and 2,5 ts/ha. The sphere of the use is the agricultural enterprises of south region of Ukraine.