%0 Journal Article %T Evaluation of chlorophyll meter (spad) for predicts Nitrogen status of corn (Zea mays L.) In the Fie %A Rostami, Majid %A Koocheki, Alireza %A Nassiri Mahallati, Mehdi %A Kafi, Mohammad %J American-Eurasian Journal of Agricultural & Environmental Science %@ 1818-6769 %D 2007