This investigation was carried out in Shandweel Agriculture Research
Station during 200012001 and 200112002 seasons. Onion sets .of cultivar Giza 6
Mohassan were used in this work to study the effect of planting dates and orientation
of ridges on the emergence of dry onion sets in the field. The obtained data obviously
indicated that the last planting date(1 Odober) gave the best results for the
percentage of emergence, daily of emergence rate and percentage of missing plants
in both seasons. Also, the orientation of ridges significantly affeded all studied
characters except the total bulb yield in both seasons. The best results achieved by
the orientation of ridges from east to west(south side).Moreover. the interaction
between the two studied factors take the same general'trend in both seasons.