List of Articles Biological yield Open Access Article Abstract Page Full-Text 1 - Evaluation Amino Acids and Iron Nano particles on Photosynthetic Pigments and Yield of Potato Arash Roozbahani Sanaz Pour Ali Open Access Article Abstract Page Full-Text 2 - Effects of Drought Stress and Humic Acid on Plant Growth, Yield Quality and Its Components of Quinoa (Chenopodium quinoa Willd) Farah Mohammadi Abbas Maleki Amin Fathi