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Abstract
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This study in order to evaluate the effect of humic acid. iron chelate، nano-iron chelate on Iron uptake and growth indices of tomato transplant was performed. In the experiment a of completely randomized design with three replications was used. Treatments include 8-compound fertilizer The two levels of humic acid(0,0/15 grams per liter) iron(0,0/3 grams per liter) ) and، nano-iron chelated(0,0/2 grams per liter) with two varieties of tomato. The results obtained showed that the application of a combination of all three humic acid fertilizer, iron chelated and iron nano chelated significant effect on the absorption of iron in the plant. But the combination of humic acid and iron nano chelated size of stem diameter and plant height showed the highest impact.
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