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The study presents the results of field experiments, the aim of which was to assess the yield of maize cultivars with different genetic profiles depending on the method of soil preparation for sowing and the method of NP fertilizer application. The yield and water content in the grain were significantly dependent on changing weather conditions in the growing seasons. Sowing maize into the soil cultivated traditionally (autumn ploughing), stay-green type cultivars and row fertilization positively influenced maize yielding. The stay-green cultivar yielded at a higher level compared to the fast maturing cultivar, the difference being significant in the year characterized by unfavourable distribution (deficit) of precipitation in the growing season. The stay-green cultivar reacted favourably to the localized application of NP fertilizer, the clear result of which was the increase in grain yield. Direct maize sowing significantly reduced the number of production ears per surface area unit and the number of grains on the ear. Selection of the stay-green cultivar and row fertilization with NP fertilizer improved this condition.

Yielding of two types of maize cultivars in relation to selected agrotechnical factors