DR. ROLAND GBARABE; ENGR DAYE O. BARANGO. Nitrogen Status of the Soil in the Captain Elechi Amadi Polytechnic Demonstration Farm. Journal of Progress in Engineering and Physical Science, [S. l.], v. 4, n. 1, p. 40–43, 2025. Disponível em: https://www.pioneerpublisher.com/jpeps/article/view/1229. Acesso em: 30 apr. 2025.