The scientific literature rarely describes the harvest index of winter oilseed rape, most probably due to difficulties in its estimation, resulting from the cracking of siliques. Our work aimed at evaluating the harvest index of winter oilseed rape, depending on the cutting height of plants of different size categories, described in the 1^st part of our work. Plants harvested from the field were dried, weighed and then 10 cm sections of the main shoot were cut off, simulating crop cutting during combine harvest. The obtained sections of plant shoots were weighed and a diameter of each was measured individually. Due to the specific distribution of dry mass in the lower section of the main shoot, an improvement of the harvest index value with raising the height of cutting the plants was obtained. Cuts at height of 60 cm increased the harvest index value by 0.08-0.09. Moreover, cutting oilseed rape at height of 60 cm is technically easier and fragments of the main and lateral shoots are left on the field as high stubble of an estimated mass of 1967.5 kg·ha^-1. Moreover, this technological solution may optimize harvesting, due to speeding it up.

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