ENHANCING THE ECONOMIC AND HEALTH BENEFITS OF BLACKBERRY GROWN IN SOILLESS CULTURE BY FOLIAR APPLICATION OF POTASSIUM SULFATE: ENHANCING THE ECONOMIC AND HEALTH BENEFITS OF BLACKBERRY GROWN IN SOILLESS CULTURE BY FOLIAR APPLICATION OF POTASSIUM SULFATE. (2026). Iraqi Journal of Market Research and Consumer Protection, 18(2), 278-289. https://www.jmracpc.uobaghdad.edu.iq/index.php/IJMRCP/article/view/619