The aim of the performed winter wheat experiment was to investigate the nutrient reaction of an extensive winter wheat line (1401HK winter wheat line) on acidic sandy soil with weak nutrient supply, considering the major crop parameters and biomass weight and yield. Significant difference was found between the cropping year, which also had a significant effect on the examined parameters. The effect of the cropping year on ear lenght and on the number of grains per ear was also expressed; the higher standard deviation and decrease of these parameters were found in 2015/2016. We also experienced a larger deviation in grain weight in the ear in the same year, but there was no statistically justifiable difference in this parameter from different cropping years. Of the different nitrogen treatments, the use of high-dose nitrogen resulted in a statistically significant increase in the grain weight. The thousand grain weight was affected by the weather during the grain filling period. The extreme weather of the 2015/2016 cropping year had a critical and negative effect on the ear number per unit area, in the 2014/2015 cropping year the ear number unit area was negatively influenced by the increasing nitrogen quantity applied. In terms of specific biomass weight, in the 2014/2015 cropping year, application of 54 kg ha-1 nitrogen caused the highest biomass weight, in 2015/2016 cropping year the highest nitrogen content applied (108 kg ha-1) caused the same effect. In terms of yield, significant fertilizer effects were observed both in terms of the examined years, and the applied nitrogen content; the application of increasing nitrogen doses also increased yield. The obtained yield was significantly lower in the 2015/2016 year due to unfavourable tillering characteristics. Based on the correlation analysis results, the majority of positive strong correlations were detected in relation to the ear number per unit area, showing a strong positive correlation with the specific biomass weight and yield. The ear length showed a strong positive correlation with the seed number per ear, and the seed number per ear showed a close positive correlation with the seed weight in the ear. Considering the yield, the specific biomass weight and the ear number per unit area were shown to be significant, but the ear length also showed a positive correlation with yield. Of the examined parameters, the least close correlation was found on sandy soil, between the seed number per ear, seed weight per ear or thousand grain weight, respectively. Thousand grain weight showed a moderate positive correlation with weight per ear, but showed a moderate negative correlation with the ear number per unit area. The strongest effect of the cropping year was observed on the ear number per unit area (78%), biomass weight (71%) and yield (69%) based on factor analysis. The effect of nitrogen supply was 40% in the thousand grain weight, considering the ear parameters, while its effect had a 46% significance in the ear length and 56% in terms of seed number per ear. The highest fertilizer effect was found in the seed weight per ear (82%).

Keywords: sandy soil, nitrogen supply, winter wheat, yield forming element