PROBLEMS OF INTRODUCTION OF CALLISTEPHUS CHINENSIS (L.) NEES IN SUMY NATIONAL AGRARIAN UNIVERSITY
The state of Callistephus chinensis cultivar researchers in Ukraine and Sumy National Agrarian University has been shown. The reply responses of Callistephus chinensis varieties to different rates of active ingredient of complex mineral fertilizers have been presented. Prolongation of flowering period as a result of fertilizer application has been set. The best characteristics concerning number of blossoms, plant height and seeds formation per plant have been obtained by application of 6 g/m <sup>2</sup> active ingredient of complex NPK fertilizers.