الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
This work was carried out on Giza 20 onion variety during 1980 and 1981 seasons in the fa.rm and laboratories of the Gemmeiza Agricultural Research Station at Gherabia Governorate in order to study the effect of powering gamma irradiation of onion seeds as well as soaking. Them in boric acid; gibberellin acid and their combining solution on onion yield. Onion seeds were subjected too1000, 2500qciand 5000 rad of cobalt, 60 gamma ray. Irradiated seeds were soaked for 20. Hours in aqueous solution of boric acid containing, 100 Basques solution. Of GA containing led or 200 ppm.GA, the. Irradiated seeds were also soaked in the following $olu1sion. 1- 0.1% B X 100ppm.GA 2.0.1% B 200 ppm.GA 3- 0.2% B x 100 ppm.GA 4- 0.2% B x 200 ppm. GA the control seeds were soaked in distil1ed water.