Effect of Weed Interference on Yield and Quality of Flax Seed Oil

In 26 field experiments over a 4-yr period, weed interference significantly reduced the oil content of flax seed (Linum usitatissimum L. ’Linott’) in 21 of the experiments and the iodine value of flax seed oil in 19 of the experiments, regardless of dominant weed species. Seed density and seed weight were not seriously affected by weed interference. Flax seed yields were reduced by weed interference in 25 of the experiments.