Effect of cover crops in smothering weeds and volunteer plants in alternative farming systems

The research objective was to investigate the competitive ability of plants cultivated as cover crops: narrow-leafed lupine (Lupinus angustifolius L.) in mixture with an oil radish (Raphanus sativus var. Oleiferus Metzg.) (LUPRA); white mustard (Sinapis alba L.) (WM); white mustard in mixture with a common buckwheat (Fagopyrum exculentum Moench.) (WMBU) to smother weeds in organic and sustainable farming systems. Cover crops cultivated for green manure were investigated during the post-harvest period of winter wheat.