Davoodi Mackinejad, Malahat, Tohidi Moghadam, Hamid Reza, Nemati, Nabi-Alah. Effect of foliar application of ascorbic acid (vitamin c) and irrigation withholding in different growth stages on quantitative and qualitative characteristics and some biochemical's changes in Sunflower (Helianthus annuus L.). . 2013;10(3):221-230. doi: