Agronomic Biofortification with Se, Zn, and Fe: An Effective Strategy to Enhance Crop Nutritional Quality and Stress Defense—A Review

Abstract Human micronutrient deficiencies are a widespread problem worldwide and mainly concern people whose diet (mainly of plant origin) consists insufficient amounts critical vitamins minerals. Low levels micronutrients in plants linked to, i.e., their decreasing concentration soils and/or low bioavailability presence abiotic stresses which disturb the proper growth development plants. Agronomic biofortification crops is very promising way to improve edible parts without compromising yield recognized as cheapest strategy alleviate hidden hunger worldwide. The review focused on factors influencing effectiveness biofortified (a type application, form, dose applied microelement, biofertilizers, nanofertilizers). Also, accumulation zinc, selenium, iron crops, effects metabolism, morphological parameters, an impact plants’ defense mechanisms against stress like salt, high/low temperature, heavy metal, drought was discussed. Finally, directions future agronomic studies proposed.