Agronomic biofortification with zinc and iron can boost nutrient levels in mangoes. A study applied foliar sprays of ZnSO4 and FeSO4 to mango trees and found that the treatment increased N, K, P, Fe, and Zn levels in the fruit. The best results were seen with a combination of 0.50% FeSO4 and 0.50% ZnSO4, which significantly enhanced the nutrient content in both the pulp and peel of the mangoes.