Barat Y. Productivity and quality of brewer’s spring barley’s grains according to mineral nutrition, seeding rate, terms and ways of harvesting.

The object of the investigation is the reaction of spring barley sorts to technological growing measures: seed sowing rates, applying mineral fertilizers, harvesting dates and ways and peculiarities of their interaction in soil-climatic conditions. The aim of the investigation is scientific justification and developing agro- technical measures of sort adaptive technology of growing spring brewer's barley in Left Bank forest-steppe zone which would provide getting the greatest productivity of high quality and safe grain. The methods of investigations are field, laboratory, mathematically-statistical, calculated-comparative. Results: scientifically justified recommendations as to improving elements of sort technology of growing spring barley are developed. They include using sorts Tsezar and Hetman at the seed sowing rates 5,0 mln/ha, fertilizer N60P60K60, harvesting with direct using combine harvester in complete grain ripeness or applying separate way at the end of wax ripeness that stimulate forming highest productivity and providing processing industry with safe grains. Novelty – the complex influence of mineral fertilizers, seed sowing rates, harvesting dates and ways depending on weather conditions upon elements of grain yield structure, yield and grain quality of spring brewer's barley sorts such as Tsezar, Hetman and Halactyc are scientifically established for the first time in the Left Bank forest-steppe zone. The results of the investigation are checked in farming conditions on the area of 216 ha and they are introducing on farms in Poltava region. Sphere of use – Agriculture.