The research was conducted in 1999-2002 at the Brody Experimental Station of the Poznań Agricultural University. The aim of this study was to determine the effect of tillage systems (conventional, reduced and direct drilling) on yield, weed infestation of maize and physical and chemical soil properties. Reduced tillage and direct drilling systems caused a decrease in the number and height of plants and total dry matter yield of maize as compared to conventional tillage. A continuous use of reduced tillage systems had negative effect on soil physical properties, but increased the weed infestation of maize. A change from conventional system to reduced or direct tillage system causes an accumulation of C, N, K and Mg in the topsoil.

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