Tripathi, ShaileshJitendra Kumar2019-08-192019-08-192019-06http://krishikosh.egranth.ac.in/handle/1/5810122334The present study was conducted at Horticultural Research Centre, Patharchatta, GB Pant University of Agriculture & Technology, Pantnagar during the year 2016-17 and 2017-18. In this study 63 guava cv. Sardar trees planted at a spacing of 8×4 m were subjected to foliar sprays of calcium, magnesium and iron at the time of fruit set and again after one month to evaluate the effect of foliar sprays of calcium, magnesium and iron on yield and quality of guava. The experiment was carried out in Randomized Block Design with 21 treatments and 3 replications. The foliar sprays of calcium, magnesium and iron significantly influenced vegetative and physico-chemical characters of fruits. Treatments also affected the leaf nutrient status and leaf chlorophyll content significantly. Most of the parameter were found to be maximum under the treatment T21 [FeSO4 (0.6%) + CaCl2 (0.6%) + MgSO4 (0.6%)]. However, titratable acidity was significantly lowest under the treatment T21. Some of the treatments viz., stem girth, fruit length, fruit diameter, fruit length : diameter ratio, fruit specific gravity and seed related characters were non-significantly influenced by the nutrient sprays. From the present study, it can be concluded that foliar sprays of calcium, magnesium and iron are beneficial for improving yield and quality of guava cv. Sardar and overall plant growth. Further, 0.6 per cent each of FeSO4, CaCl2 and MgSO4 foliar sprays two times at one month’s interval can obtain the best results in terms of better plant growth, yield and quality of fruits.ennullThesis