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, [S. l.], v. 2, n. 1, p. 15–22, 2024. DOI: 10.62050/ljsir2024.v2n1.275. Disponível em: https://lafiascijournals.org.ng/index.php/ljsir/article/view/275.. Acesso em: 30 jun. 2024.