الفهرس 
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Abstract
The present investigation was carried out over
a period of two successive seasons ; 1983 and 1984 on
end Zebda to study the effect of inorganic nitrogen fertilization as well as growth regulator treatments
on DROPping fruits, Yield, physical and chemical propperties of the fruits. Trees devot.ed for this study were grmvn under Mall’awy enviromenta;l condi tions(50 lons far
Three levels of inorganic nitrogen fertilization (0, 1000 and 2000 gms I tree) were added at two equal
1. Raising the level of inorganic nitrogen fertilization up to 2000 ems I tree resulted in reducing the
7. In most cases no si~~ificant differences hed been noticed between dates of sprayinG gibberellic acid, either sprayed et full bloom or two weeks later.
o. Under the experimental conditions, supplying Hind,)’ Kassal1, Zebda Bnd Taimour meneo trees with inorganic nitrogen fertilization in the form of ammonium nitrate (33.5% N)at arate of 2000 gms N/ tree applied at two equal applications as well as sprayinG them with gibberellic acid at
100 p.p.m. is recommended. Since the prementioned treatment represented the lowest percentage of DROPping fruits and the highest yield per tree. Moreover,fruits quality were fairly good.