Influence of poultry manure and NPK fertilizer on yield and yield components of crops under different cropping systems in south west Nigeria. International Journal of Manures and Fertilizers, [S. l.], v. 9, n. 1, p. 1–7, 2021. Disponível em: https://ijpp.org/journal/index.php/ijmf/article/view/92. Acesso em: 23 mar. 2026.