The experiment on foliar application of Ca, Zn, Fe and B on physiological attributes, nutrient status, yield and economics of papaya (Carica papaya L.) cv. Taiwan Red Lady revealed that the foliar application of calcium nitrate 1000 mg/l + borax 30 mg/l + zinc sulphate 200 mg/l + ferrous sulphate 200 mg/l during 60, 90 and 120 days after planting were found better with respect to increase in photosynthetic rate, transpiration rate, leaf temperature and total chlorophyll contents with pronounced results regarding nutrient contents of papaya cv. Taiwan Red Lady. Looking to the yield and economics, there was higher yield (80.76 t/ha), net return ( 282727) and BCR (3.50) in the same treatment.
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