فهرس المقالات Organic nitrogen حرية الوصول المقاله صفحة الملخص نص كامل 1 - Effect of Arginine, Proline, and Glutamine Amino Acids on Morphological and Physiological Traits of Two African Marigold (<i>Tagetes erecta</i> L.) Cultivars Fatemeh Raoof Haghparvar Davood Hashemabadi Behzad Kaviani