The aim of this research was to evaluate the effect of foliar application of calcium (Ca), Boron (B) and Zinc (Zn) alone and in combination along with different times of application (pre-flowering stage, post fruit development and combined application at both stages) on the plant growth, yield and quality of strawberry fruit. Foliar application of Ca alone and combined with Zn and B were applied. The experiment was arranged under randomized complete block design in split plot arrangement. Irrespective to application time, strawberry plant sprayed with combined application of Ca, Zn and B exhibited significantly increased leaf macro-nutrients (N, P, K, Ca), micro-nutrients (Zn, B, Fe), average fruit weight, yield, fruit size, fruit firmness, significantly higher TSS:TA ratio, ascorbic acid contents, anthocyanin and also antioxidative enzymes activity viz. catalase (CAT), superoxide dismutase (SOD) and peroxidase (POD)] than untreated plants. Similarly, spraying at both stages (pre-flowering and post-fruit development) significantly increased number of leaves, fruits, yield and average fruit weight, significantly higher fruit TSS:TA ratio, vitamin C, anthocyanin and also anti-oxidative enzymes viz. CAT, SOD and POD of strawberry fruit. In conclusion combined foliar application of Zn, B and Ca applied at pre-flowering stage and post fruit development significantly improved the vegetative growth, fruit yield, fruit bio-chemical attributes and antioxidative enzymes attributes.

Iron (Fe) is an important micronutrient required for healthy life. Malnutrition resulting from low Fe in plant-based foods has caused serious problems worldwide. We propose that Fe biofortification of tomato through seed priming would be an innovative approach to address the problem Fe deficiency. This research was conducted to find the impact of Fe seed priming on germination, morphology, physiology, growth, yield, and final enrichment of Fe in fruit of tomato in two commercial hybrids. Tomato seeds were primed with different concentrations of iron sulfate heptahydrate (FeSO₄.7H₂O) in the range of 1–15 mg L⁻¹, resulting in differential accumulation of tomato fruit Fe contents. We observed a marked improvement in tomato seedling traits, yield contributing traits, fruit quality, biochemical attributes and physiological parameters. Interestingly, the Fe treatment concentration of 10 mg L⁻¹ demonstrated improved tomato growth with a significant increase in fruit Fe contents to of 2.04 and 2.37 which are very much higher as compared to control having Fe contents of 1.47 and 1.49 ppm respectively. Fe seed priming of tomato represents as a cost effective and user-friendly strategy for tomato biofortification which triggers Fe acquisition and its final enrichment in tomato fruit.