The objective of this study was to determine the effects potassium fertilization (applied soil at 150, 250, and 350 kg K2O ha?1) irrigation on yield (fresh matter dry above-ground biomass tubers) health status tubers leaves three Jerusalem artichoke—JA (Helianthus tuberosus L.) cultivars (Topstar, Violette de Rennes, Waldspindel). Topstar cultivar characterized by highest total tuber (60.53 Mg ...