The aim of our study was to evaluate the impact of nitrogen and sulphur fertilization on the yield and quality of garlic bulbs. In the experiment, which was conducted from November 2013 till July 2014, on the Experimental field of the Biotechnical Faculty in Ljubljana in 4 repetitions, different fertilization treatments with nitrogen (N) and sulphur (S) were performed: fertilization with 50 kg S/ha (S50) and 100 kg S/ha (S100) and without sulphur (S0); fertilization with 80 kg N/ha at one application N (80) and at two applications (N50+30) and without N (N0), and their combinations. Together we had 9 treatments, which were randomly assigned to each repetition. The Spanish garlic cultivar 'Gardos' was included in the experiment. Fertilization with sulphur did not affect significantly the yield of garlic bulbs, while nitrogen fertilization significantly increased the yield (14.2± 1.8 t/ha at N80 and 12.9± 0.7 t/ha at N50+30) regarding to the unfertilized plants (8.20± 0.6 t/ha). The way of nitrogen application (once or twice) did not significantly influence the yield and quality of garlic bulbs, neither the percentage of the weight loss of garlic bulbs. After one week drying on the sun, the highest percentage of weight loss was 30±4 % at plants from treatment S100N80 and the lowest (21±6 %) was at treatment S50N80. The nitrogen fertilization significantly increased the mass and diameter of garlic bulbs, the number of cloves per bulb and the mass of individual clove in comparison to the unfertilized plants.
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