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The aim of our study was to evaluate the effects of nitrogen (N) and sulphur (S) fertilizer on harvest index (HI), agronomic efficiency (AE), physiological efficiency (PE), utilization (U), and final efficiency index (EFI). We conducted a field experiment in southeastern Poland on Cambisols (WRB 2014). The experiment included two variables: N fertilization (0, 40, 80, and 120 kg/ha) and S fertilization (0 and 50 kg/ha).
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Klikocka et al. (2017) studied this question.
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