“Study the Addition of Biofertilizer , Liquid Organic Fertilizer and Foliar Spraying of Nano-Liquid Organic Fertilizer on Some Chemical Traits on Grapevine ‘ French Black’ Cultivar”. 2023. Euphrates Journal of Agricultural Science 15 (3): 400-427. https://ejs-agri.com/index.php/EJAS/article/view/145.