The use of nano-fertilizers and antioxidants for specific crops to minimize the negative effect abiotic stresses is imperative. Two field experiments were fulfilled during two summer seasons (2019 2020) study response sweet potato (Beauregard cv.) plants grown in calcareous soil (CaCO3 = 10.8–11.3%) foliar nourishment with zinc oxide nanoparticles (ZnONPs) ascorbic acid (ASA) applied individual...