Mayi, A. A., & Ibrahim, N. J. (2015). Effect of Cultivars, Compost, Humic Acid and Their Interactions on Leaf Nutritional States of Sweet Cherry (prunus avium l.). Science Journal of University of Zakho, 3(1), 97-106. https://sjuoz.uoz.edu.krd/index.php/sjuoz/article/view/107