*2.5. Soil Analyses*

The soil chemical properties were analyzed at the beginning (2015) and in the end (2018) of the analyzed period. The soil samples were taken from the upper Ap horizons (0–30 cm) using the soil probe. Four soil samples were taken from each fertilizer treatment. The soil reaction was analyzed potentiometrically in 50 mL of 0.2 mol KCl(inoLab pH 730, Xylem Analytics-WTW, Weilheim, Germany). The soil organic carbon (SOC) content was measured according to [10,11]. The soil nitrogen content was analyzed using the sulfuric acid in the heating block (Tecator Inc., Hoganas, Sweden), followed by the Kjeldahl method [9]. The soil phosphorus, potassium, calcium, and magnesium were extracted by Mehlich III solution [12], followed by ICP–OES analysis (Thermo Scientific iCAP 7400 Duo, Thermo Fisher Scientific, Cambridge, UK).
