“Effect of mixing ratio of Olive Solid Waste and Cow manure on Serial Extraction of Iron and Zinc in Calcareous Soil”, مجلة الجامعة, vol. 1, no. 6, Jul. 2019, Accessed: Jun. 06, 2026. [Online]. Available: https://journal.hama-univ.edu.sy/huj/article/view/113