“…In Serbia, primarily in its central part, slightly acidic, acidic and extremely acidic soils are significantly represented, with over 60% of the total arable land (Jelic et al, 2015;Gudzic et al, 2019). Of all applied agrotechnical measures, the application of mineral fertilizers, primarily nitrogen, has enabled an increase in grain yield and total amounts of protein per unit area in new varieties (Đekić et al, 2014;Biberdžić et al, 2017;Terzic et al, 2018). Before the energy crisis, the price of mineral fertilizers was economically acceptable, so there was a tendency to apply increased quantities to the level where varieties were able to react by increasing yields.…”