Evaluation of the Concentrations of Nitrate, Nitrite and Heavy Metals in Spinach (Spinacia oleracea) Irrigated along the Amba Stream Lafia, Nasarawa State. LJSIR [Internet]. 2024 Feb. 18 [cited 2024 Jun. 30];2(1):15-22. Available from: https://lafiascijournals.org.ng/index.php/ljsir/article/view/275