List of Articles oil performance Open Access Article Abstract Page Full-Text 1 - Investigation of combined effect of biological and chemical fertilizers of phosphorus and nitrogen on quantitative and qualitative characteristics of sunflower (Helianthus annuus L.) Alireza Shokouhfar Sahar Khani Open Access Article Abstract Page Full-Text 2 - The effect of the date of plant, Grain density and the level of nitrogen on the qualitative and quantitative performance of spring safflowers H. Tahmasebizadeh I. Farahani