Abstract
The aim of the study was evaluation the use of nitrogen in Polish agriculture, at national (NUTS-0) and regional (NUTS-2) levels. The conducted analysis between 2002 and 2014, based on the gross nitrogen balance, showed an improvement in the use of this macronutrient in the agricultural production process in Poland. Despite the continuing negative relationship between N:P:K in applied mineral fertilizers, the efficiency of nitrogen utilization has far exceeded 60% in recent years. The use of this nutrient has also improved in most Polish voivodeships. However the differences between them are quite significant and range from 55% in wielkopolskie to 84% in the podkarpackie voivodeships. The efficiency of nitrogen utilization is significantly negatively correlated with its balance surpluses (r2 = 0.77).
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