Open Access Research Paper Views (791) The impact of nano Fe-chelate, Fe-EDDHA Non-nano and FeSO4 on the growth and physiological index in lettuce (Lactuca sativa L.) varieties grown in NFT Musa Jalali, Mehri Zargani J. Biodiv. & Environ. Sci. 4(2), 434-442, February 2014. Keywords: Chlorophyll b, Chlorophyll-a, Fe, Lettuce, NANO Fe-chelate Details