EN
A three-factor field experiment on linseed was conducted in 2000-2003. The effect of studied factors on assimilation area, seed yield and yield composition was assessed. The value of canopy leaf area index and green assimilation area index at the linseed flowering phase were most diversified by the seed sowing rate. Yielding of linseed Opal cv. (Polish brown seeded variety) and Hungarian, Hungarian Gold cv. with yellow seeds was very similar. The linseed sowing rate influenced the amount of seed yield and its components. A dose of mineral fertilizer raised from 90 to 180 kg NPK/ha increased the seed yield which grew from 1.77 to 1.88 t ha-1, i.e. by 6.2%.