Studying of oil flax varieties in collection on resistance to soil acidity

The authors have been differentiated varieties from gene pool of oil flax on stability to adverse edaphic environmental factors. Influence of change of soils acidity on productivity characters depending on a genotype was established. From various subspecies, the varieties steady to acidic reaction of soil solution were revealed. It is shown, that productivity decrease on acidic soils was caused mainly by toxicity of aluminum ions.