Abstract
The objective of this study was to evaluate weed infestation variability in selected winter wheat cultivars under different no-tillage systems. Results of the log-linear analysis proved the crucial role of tillage systems in differentiation of the number of the examined weed species. Under plough (conventional) tillage, wheat was significantly less infested by weeds as compared to simplified tillage systems. Disk harrow usage contributed to a smaller number of weeds per area unit in comparison with plots treated with a cultivator. Log-linear and correspondence analyses showed a differentiated response of the examined weed species to the tillage systems. Under plough tillage, the dominant weeds were: Viola arvensis, Stellaria media and Brassica napus. Disk harrow usage resulted in the abundance of Apera spica-venti, Brassica napus, Viola arvensis, Stellaria media and Capsella bursa-pastoris. No-tillage system (with cultivator usage) favoured the growth of Brassica napus, Viola arvensis, Geranium pusillum, Stellaria media and Capsella bursa-pastoris.
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