The paper presents the results of two experiments which covered the relationships between the tillage method (ploughing and non-plough tillage) and the level of nitrogen fertilisation (50 and 150 kg N·ha^-1) and the number of emerging weeds reaching full vegetation phase as well as phase of seed ripening and shedding. Respective weed species showed a different reaction to tillage, some remained irresponsive. There was observed a tendency to more abundant emergence as a result of plough tillage as well as more frequent reaching full vegetation, seed ripening and shedding phases as a result of tillage with the use of the cultivator. The effect of fertilisation on the development of weeds was poor. A positive effect of higher doses of nitrogen fertilization on weeds was noted in 3 cases (emergence of Stellaria media, beginning of full vegetation by Veronica arvensis and Stellaria media ripening). Lower nitrogen fertilization stimulated the germination of Chenopodium album.

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