EN
The aim of this paper was to determine relationships between the potato tuber cutting resistance and dimensional fraction of tubers and a potato variety and the correlation between cutting resistance and the index of tuber damages during combine harvesting. Investigations concerned four varietites of potatoes: Bronka, Fala, Lawina, Mila, three dimensional fractions of bulbs: 40 - 50 mm, 50 - 60 mm and above 60 mm and also tuber damage indices of the examined varieties. On the basis of the statistical analysis significant differentiation was foud out between cutting resistances of both examined varieties and dimensional tuber fractions and the correlation between cutting resistances and the indices of damage of tubers during the harvest.