Shyrokonos A. The effect of sulfur, molybdenum and microbial preparation on nitrogen nutrition, yield and quality of potato for soddy-podzolic soils in Polissay of Ukraine

The object of researches are soil nutrition conditions of soddy-podzolic sandy loam soil, potato productivity and nitrates content in tubers. The purpose of research was to optimizate nitrogen regime of soddy-podzolic soil and nitrogen nutrition by means of applying elemental sulfur and molibdenum with mineral and organic-mineral preceding fertilization and granular microbial preparations as well to increase yield and quality of potato, prevent loosing of soil fertility and improve nitrogen uptake. Methods of researches are field, labo-ratory and statistical. Scientific novelty consist in establishment in in Left-Bank lowland Polissya conditions for soddy-podzolic soils dozes of elemental sulfur and molybdenum applying that increase yield and quality of potato and considerably decrease nitrates con-tent in tubers, investiganion of influence of granular microbial preparation based on phosphorus-mobilizing and nitrogen-fixing bacteria on soil nutrition conditions and potato productivity. The basic results of researches was tested into crop production condi-tions. Field of application: agriculture, crop production.