Assessment of the Relationship between Heavy Metal Concentrations in Soil and Tea Leaves Grown at Amani in Tanga Region by Energy Dispersive X-Ray Fluorescence (EDXRF) . jhss [Internet]. 2021 Dec. 9 [cited 2024 Dec. 21];10(4). Available from: http://ojs3.bongotech.info/index.php/jehs/article/view/103