الفهرس 
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Abstract
This work was carried out at the experimental station, Faculty of Agriculture, Mansoura University, during the two successive seasons 1981 and 1982 to study the effect different planting dates and planting spaces on the production of onion seeds and its quality. Salient results from this work are summarized as follows: There were significant different between dates for all vegetative traits. The early plenty date. Was favorable and significantly deviated from the other two dates of plantings. The intermediate date the planting date appeared to exhibit similar performances Since the differences between them were not significant for all vegetative traits. P1anting dates did not show higher performance number of days from planting to 50% altheas if we considered the number of days between each pinged However, the early dates started to bloom from two to four days earlier than the intermediate and the. Late date. The other flov1erine traits showed higher performar1ca in the early planting dates than the intermediate and the late Planting date.