%0 Journal Article %T The effects of Thrichoderma harzianom extract on the chlorophyll rate and nitrate concentration in two varieties of Lettuce in soilless culture system %A Ahoei, Shahab Aldin %A Nemati, Seyyed Hossein %A Rouhani, Hamid %A Arouiee, Hossein %J Journal of Middle East Applied Science and Technology %@ 2305-0225 %D 2014