Nejatzadeh-Barandozi, F. (2019). INVESTIGATION OF SUPER ABSORBENT POLYMERS AND ZINC SULFATE ON THE YIELD AND YIELD COMPONENTS OF Calendula officinalis L. Acta Scientiarum Polonorum Hortorum Cultus, 18(2), 105–113. https://doi.org/10.24326/asphc.2019.2.10