Evaluation of the Concentrations of Nitrate, Nitrite and Heavy Metals in Spinach (Spinacia oleracea) Irrigated along the Amba Stream Lafia, Nasarawa State. LJSIR [انترنت]. 18 فبراير، 2024 [وثق 17 مايو، 2026];2(1):15-22. موجود في: https://lafiascijournals.org.ng/index.php/ljsir/article/view/275