One new means of raising the productivity of oilseed flax is intercropping with legumes or cereals, which increases the biodiversity of farmland, increases flax yield, and improves the quality of the flax crop (Zajac et al. [40], [43]). In most European countries, oilseed flax is treated as an alternative to other oilseed plants, but in some countries an attempt has been made to expand the area covered by this species due to the growing demand for a variety of flax products (Klimek-Kopyra, Zajac, and 'Slizowska [18]). Keywords: Productivity; boron; cultivar; fiber; ; ; ; EN Productivity boron cultivar fiber ZH 8485 8496 12 11/21/22 20221220 NES 221220 Introduction Common flax or linseed ( I Linum usitatissimum i ) is an economically important agricultural plant. Preparation of oilseed flax straw for analysis of short fiber Oilseed flax straw was subjected to natural retting with warm water and then rinsed with clean water, after which the excess water was removed by pressing the straw between rollers. [Extracted from the article]