EN
In the period 1993-1995 in the Experimental Station belonging to Olsztyn University of Agriculture and Technology the experiment was carried out aimed to study of growing buckwheat on soil of good wheat complex (cultivars Hruszowska, Emka and Kora) and rate of nitrogen applying (40 kg N ha before sowing + 0 during flowering, 20 + 20 or 0 + 40) effects on yield and seed sowing value of buckwheat. Seed yields ranged from 0,71 to 2,71 t/ha and significantly higher yielded cv. Kora and the lowest yield was noted for Emka. В iological yield (harvested using human force from microplots) amounted above 3,0 t/ha. Losses of buckwheat seeds during the growing period amounted to 44% on average. Nitrogen applied during buckwheat flowering limited crop lodging, but on the other hand adversely affected sowing value of obtained yield, compared to treatment where whole rate of N was applied before sowing. In the above ground mass of buckwheat yield seeds of Raphanus raphanistrum were not found.