Yakovenko R. Apple-tree productivity on replant site under long-term fertilization in the Right-Bank Forest Steppe zone of Ukraine

Object of research - regularities of the growth and fruit bearing of the trees depending on fertilization. Purpose of research - increasing the plantation productivity and apple fruit quality on replant site by using efficient fertilization system of dark-grey opodzolic heavy loam soil. Methods of research - field, laboratory, mathematic-statistic. Theoretical and practical results - a rational fertilization system in winter apple tree plantation on replant site on seed and medium clonal rootstock in the period of full fruit bearing was recommend. Scientific novelty - in a southern part of the Right-Bank Forest Steppe Zone of Ukraine, regularities of the growth and fruit bearing of apple trees, var. Idared, on seed and clonal M4 rootstock and var. Kalvil snihovyi on seed rootstock on replant site under long-term fertilization were first identified. Extent of introduction - in the training-scientific-production department and in the course of teaching "Fruit science" at Uman state agrarian university. Sphere of application - commercial horticulture, agrarian educational institutions.