Shvab S. Oil flax productivity depends on the norms seeding and fertilizers the conditions of Ukrainian Polissya.

The object of the research - processes of flax growth and development as well as its productivity and quality depending on seeding amount and fertilizing. The objective of the research - to establish interdependence between weather conditions, oily flax seeding amount, fertilizer rationing and yield amount, seeds and fibre quality; to define economic and energetic efficiency of seeding amount and fertilizer rationing. Methods - analytical, laboratory, field, measuring and weighing, mathematical and statistical, correlative and regressive, calculative and comparative. The peculiarities of formation of newly- developed flax capacity and quality depending on weather conditions, seeding amount and fertilizer rationing in Ukraine's Polissya (Zhytomyr region) have been discovered. The optimal seeding amount and fertilizer rationing for new and promising oily flax varieties securing big crops of high quality seeds and fibre have been determined. The technology of oily flax growing on the Zhytomyr region areahas been worked out as a result of the research. The sphere of usage includes agricultural production.