Winter wheat yield responses to mineral fertilization

The results of the triennial experiments show big influence of climate conditions (year) and sites on usage of nutrients from fertilizer and forming of wheat yield. The highest fertilization dosage (N5P2K2) in average almost doubled the total mass yield and wheat grain yield comparing to the control (grain yield from 3.82 to 7.02 DM t ha−1, and top soil mass yield from 8.01 to 14.59 DM t ha−1). Fertilization with nitrogen, which according to the phosphorus input in average increased the grain yield 3.5 times and above ground mass yield 10 times, and according to the potassium 4 and 20 times, had the biggest influence on both yields. Economic calculation should show whether and to which extent should one invest into fertilization on each particular site, especially on soils with poor productivity. Non appropriate fertilizer use may result in non sustainable plant nutrition.