الفهرس 
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Abstract
The present investigation was carried out in the Orchard at Kafr El-Dawar, Behera, Governorate. The effect of aqueous spays of GA (growth porloter) and CCC (grou-rth retardant) at different concentrations ( 0 , 250, 500 and 1000 ppm) on flower production, fmit set percentage, some fruit physical and chemical charm-kers , vegetative growth, yield and biennial bearing were sbtdied in Egyptian mandarin in the two seasons 1978 and 1979.