الفهرس 
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Abstract
Two experiments were carried out at the Experimental Farm of the
Faculty of Agriculture, Sohag University during 2010/2011 and 2011/2012
winter seasons, where the soil is newly reclaimed.
The present investigation was carried out to study the response of foliar
micronutrients application (without, once,twice and three times), three onion
cultivars , different potassium fertilization levels (0,50,100,150 kg K2O/fed.),
and post-harvest storage potential under Sohag conditions. The findings of the
investigation have been summarized in this chapter.
First experiment :
a. Micronutrients :
The most field studied characters plant height (cm), number of
leaves/plant, bulbing ratio, neck diameter (cm), bulb diameter (cm) and total
yield (ton/fed.) were affected significantly by micronutrients foliar application.
Where, the highest value of plant height (cm), nomber of leaves/plant, neck
diameter (cm), bulb diameter (cm) bulbing ratio, and total yield (ton/fed.) were
obtained from three times foliar trace elements application in both seasons.
b. Cultivars :
The most field studied characters plant height (cm), number of
leaves/plant, neck diameter (cm), bulb diameter (cm), bulbing ratio, and total
yield (ton/fed.)were affected significantly by cultivars. where the data showed
that Giza 20 cultivar was the tallest plants, gave the highest number of leaves
per plant, the highest in neck diameter, produced the highest total bulb yield in
both seasons. While, Shandaweel 1 cultivar was the earliest maturity in both
seasons.