International Journal of Environment and Climate Change

The present investigation “Effect of foliar application of various micronutrients on fruit yield and quality attributes of Guava (Psidium guajava) cv. Allahabad safeda” was undertaken at Central Research Field, Department of Horticulture, Naini Agricultural Institute, Sam Higginbottom University of Agriculture, Technology & Sciences, Prayagraj (UP) during 2022-2023. The experiment was laid out in a Randomized Block Design (RBD) with 10 treatment combinations viz, T₀ (Control), T₁ (FeSO₄) 0.4%, T₂ (ZnSO₄) 0.5%, T₃ (H₃BO₃) 0.4%, T₄ (KNO₃) 3%, T₅ (FeSO₄) 0.4% + (ZnSO₄) 0.5%, T₆ (ZnSO₄) 0.5% + (KNO₃) 3%, T₇ (KNO₃) 3% + (FeSO₄) 0.4%, T₈ (H₃BO₃) 0.4% + (KNO₃) 3%, T₉ (FeSO₄) 0.2% + (ZnSO₄) 0.25% + H₃BO₃ (0.2%) +(KNO₃) 1.5% with three replications. The main objective of the experiment was to find out the effect of various levels of micronutrients on yield and quality of guava and to estimate the economics of various treatments. From the present investigation treatment T₉ (FeSO₄) 0.2% + (ZnSO₄) 0.25% + (H₃BO₃) 0.2% +(KNO₃) 1.5%, performed best in terms of yield parameters, (fruit weight (130.45g), fruit length (7.93cm), fruit diameter (7.28cm), fruit yield per tree (42.10 kg) and quality parameters T.S.S (10.23⁰Brix), Acidity (0.38%), Ascorbic acid (150.03mg/100g), Total sugars (7.86%) of Guava. However, highest B: C ratio was found in Treatment T₅ (FeSO₄ (0.4%) +ZnSO₄ (0.5%) with 4.61.