BELLO, W.B.; OLLA, N.O.; ABDUL AZEEZ, S. A. Effect of NPK fertilizer, Poultry manure, compost and their integration under different methods of application on Maize yield . Journal of Agricultural and Environmental Science Research, Nigeria, v. 5, n. 1, 2024. Disponível em: https://hummingbirdjournals.com/jaesr/article/view/171.. Acesso em: 5 oct. 2025.