EN
Investigations carried out in the years 1986 - 1988 ln Wrocław voivodship took four Iow in erucic acid varieties of winter rape /Jet Nauf, Beryl, Jantar and Ceres /into account. It was found that honey yield of low in erucic acid varieties /av. 140 kg ha⁻¹/ approximate yield of varietes high in erucic acid published in the literatura. Honey yield differences of tested varieties /av. 25 %/ were caused mainly by number of flowers differentiation. Meteorological conditions of particular years are liable to cause over 100 % differences in nectar secretion and honey yield.