The 1992-1996 experiments defined the effect of organic fertilisation (farmyard manure, after harvest residue and the total mass of intercrop) and mineral fertilisation (0, 400, 600 kg NPK?ha^-1) on field emergence, final stand, yield and quality of sugar beet root. The highest root and leaf yield was obtained when fertilised with the total mass of black medic and mixture of black medic and Italian ryegrass, yet the biological and technological sugar yield – when fertilised with the total mass mixture of black medic and Italian ryegrass and also when fertilised with farmyard manure. The increase in the mineral fertilisation caused an essential increase in the root and leaf yield yet the decrease in the final stand of sugar beet and the quality of roots. Fertilisation of sugar beet with 400 kg NPK?ha^-1 resulted in the biggest field emergence and technological sugar yield.

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