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The effect of fertilization with a new fertilizer on Polish market, a mixture of ammonium nitrate and ammonium sulfate (30% N, 6% S), was analysed in a three-year field experiment. The mixture commonly available on the market (26% N, 13% S) and ammonium nitrate, were used for comparison. Each fertilizer was applied in three doses: 150, 200 and 250 kg N/ha/year (simultaneously, 30, 40 and 50 kg S/ha were introduced with the mixtures). The highest mean (of the three years) grain yield (8.27 t/ha) was obtained after application of 200 kg N and 40 kg S/ha as the new fertilizer, with almost no significant effect of the type and dose of sulfur-containing fertilizers. Sulfur content in the grain was highest after the new fertilizer application; the content increased with increasing fertilizer dose. The highest mean protein (13.9–14.3%) and gluten (28.3–28.9%) content were recorded after application of 250 kg N/ha, and Zeleny sedimentation index (45.0–45.3 cm3) – after application of 250 kg N and 50 kg S/ha, regardless of the fertilizer. Sulfur intensified the acidifying effect of ammonium nitrate and increased the content of sulfates in the soil.

Ammonium nitrate enriched with sulfur influences wheat yield and soil properties