Strydom, J. “The Effect of Foliar Potassium and Seaweed Products in Combination With a Leonardite Fertigation Product on Flame Seedless Grape Quality”. South African Journal of Enology and Viticulture 35, no. 2 (September 23, 2016): 283–291. Accessed February 23, 2026. https://www.journals.ac.za/sajev/article/view/1017.