Applying Some Mathematical Models to Estimate Leaf Area of Christ’s-thorn Jujube trees (Ziziphus spina-christi L.) Based on Leaf Morphometric Measurements in the Koya District. UHD J SCI TECH [Internet]. 2026 Aug. 2 [cited 2026 Nov. 6];10(2):52-8. Available from: https://journals.uhd.edu.iq/index.php/uhdjst/article/view/1798