Yihenew G. Selassie, Amnat Suwanarit, Chairerk Suwannarat, Ed Sarobol. Equations for Estimating Nitrogen Fertilizer Requirements from Soil Analysis for Maize (Zea Mays L.) Grown on Alfisols of Northwestern Ethiopia. Agr. Nat. Resour. [internet]. 2003 Jun. 30 [cited 2026 Sep. 17];37(2):157-6. available from: https://li01.tci-thaijo.org/index.php/anres/article/view/242857