EZEAKU, P. I. . Quantitative Difference Method for Estimation of Fertilizer Nitrogen Balance and Uptake by Zea mays on an Orthic Oxisol of North Central Nigeria. Journal of Biological Research and Biotechnology, Nigeria, v. 7, n. 1, p. 418 – 421, 2025. DOI: 10.4314/br.v7i1.45463. Disponível em: https://bio-research.com.ng/index.php/home/article/view/348.. Acesso em: 23 may. 2025.