In these studies, the effect of the level and method of nitrogen and phosphorus application on the qualitative traits of sugar maize cobs was determined depending on the sowing date. It was shown that maize sowing on the earliest date (third decade of April) provided the highest yield of fully-grained cobs and their proportion in the total yield of cobs without covering leaves. Delay in sowing by a month caused a significant decrease in the values of these quality traits of sugar maize cobs. Application of starter fertilisation with ammonium phosphate increased the yield of grained cobs by 100% when the entire nitrogen dose was applied before maize sowing, regardless of its level. Starter fertilisation with ammonium phosphate had a positive effect on the proportion of fully-grained cobs in the case of the nitrogen dose of 40 kg·ha^-1 applied before sowing. Starter fertilisation decreased, in relation to spread fertilisation, the proportion of fully-grained cobs in the case of the nitrogen dose split into pre-sowing and top-dressing.

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