Kohan A. Agrotechnica measures of increase of the productivity of sunflower are in the conditions of south Steppe of Ukraine.

An object is agrotechnical measures of increase of the productivity of sunflower under act of biofertilizers, as ecologically safe element of technology. A purpose is determination of features of forming of the productivity of sunflower depending on application of biofertilizers and influence of them on the nourishing mode and biological activity of soil in the conditions of south Steppe of Ukraine. Methods are the field and laboratory-field experiments. Results: As a result of realization of researches influence of biofertilizer is complex investigational Baikal ЕМ- 1 and Agrovit-kor on the productivity, biometric indexes of culture, nourishing and microbiological mode of soil, and possibility of increase of the productivity of sunflower is set due to the use of biofertilizers in technology of growing of culture. The worked out agrotechnical measures by activation of the ground microflora allow to increase the productivity of sunflower on 26-30 % comparatively with control and to increase a net income at growing of sunflower comparatively with control on 20-23%. Results are inculcated in the economies of different patterns of ownership in south part of Steppe of Ukraine. Sphere of use is Agriculture.