The study was carried out over 1996-1998 on a good rye complex following the randomised split-plot method. Four factors were examined: cultivation technologies – conventional technology (control), polyethylene sheeting, polypropylene sheeting, polypropylene + polyethylene sheeting; methods of potato cultivation – mechanical, Afalon, Racer, mixture of Afalon + Command; potato cultivars – Aster and Drop; tuber harvest dates – 60 and 75 days since planting, harvest at full maturity. Technologies of cultivation using covers as well as herbicide application increased the total and commercial yield of tubers. The mixture of herbicides showed most yield-enhancing.

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