Fig. 2From: Fulvic acid foliar application: a novel approach enhancing antioxidant capacity and nutritional quality of pistachio (Pistacia vera L.)The impacts of different concentrations and application times of fulvic acid on chlorophyll (a) and carotenoid (b) content of ‘Kaleh-Ghoochi’ pistachio nut. Different letters show significant differences among means according to the Duncan test at P < 0.05Back to article page