2024. Evaluation of the Concentrations of Nitrate, Nitrite and Heavy Metals in Spinach (Spinacia oleracea) Irrigated along the Amba Stream Lafia, Nasarawa State. Lafia Journal of Scientific and Industrial Research. 2, 1 (Feb. 2024), 15–22. DOI:https://doi.org/10.62050/ljsir2024.v2n1.275.