In a field experiment in years 2007-2009 at Mochełek (53^o13’ N; 17^o51’ E) near Bydgoszcz on good rye complex soil, the effect of forecrop (spring barley, blue lupine, blue lupine + spring triticale, spring rape) and nitrogen fertilisation (40, 80, 120, and 160 kg N∙ha^-1) on the yield and grain technological quality of winter wheat cultivar Tonacja was estimated. It was stated in the research that significant elements in the agronomical practices of winter wheat grown on light soil, although affecting independently, are forecrop and nitrogen fertilisation. Grain yield and its quality on a worse stand cannot be improved by increased fertilisation. The most favourable stand for winter wield yield was blue lupine in pure sowing. Spring rape, and also a mixture of lupine with spring triticale and spring barley were worse forecrops than blue lupine. On light soil in region and years with relatively low precipitation sums during the growth period, independently of forecrop, nitrogen fertilisation above 80 kg N·ha^-1 did not increase significantly grain yield but affected positively its technological quality.

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