Micronutrients are key elements in plant growth and development. Deficiencies of Ca, Zn, Fe and B have been increasing in some fruit crops. Some reasons are higher crop yields which increase plant nutrient demands, use of high analyses NPK fertilizers containing lower quantities of micro-nutrient contaminants and decreased use of farmyard manure on many agricultural soils. The combined foliar application of Ca, Zn, Fe and B as a source of calcium nitrate 1000mg/l + borax 30mg/l + zinc sulphate 200 mg/l + ferrous sulphate 200 mg/l was favorable to influenced the plant growth characters, physiological attributes, yield as well as quality of papaya. Moreover, the application of borax individually at 30mg/l was showed the earliness in flowering when apply at 60, 90 and 120 days after planting of papaya cv. Taiwan Red Lady.

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Dr. Pankaj P. Bhalerao completed his Ph. D. degree in Horticulture (Fruit Science) at Navsari Agricultural University, Navsari, Gujarat (India).He has published many research papers, abstract and popular articles in reputed journals of India. Dr. B. N. Patel presently working as Associate Directorate of Research at NAU,Navsari Gujarat (India).