Estimation of some heavy elements (Pb, Cd, Ni and Co) in chemical and organic fertilizers and their impact on the safety of the environment and the consumer. cbej [Internet]. 2022 Dec. 18 [cited 2024 Jul. 19];22(95):151-8. Available from: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/8029