Onion (Allium cepa L.) is one of the most important vegetables from economic and health aspects in Iran. This crop is cultivated 3000 years before AD .Iran is probably one of onion origins in the world. This crop has many native cultivars in Iran at white and red and yellow groups. Onion is planted in a vast area in Iran specially humid climate . Onion is packaged in 20-25 kg mesh bags from 4-8 cm available .A 40’RF container contains 25 MT.