The effect of poultry manure and NPK fertilizer on yield and yield components of crops based on different cropping systems in south west Nigeria. International Journal of Manures and Fertilizers, [S. l.], v. 1, n. 1, p. 91–97, 2012. Disponível em: https://ijpp.org/journal/index.php/ijmf/article/view/284. Acesso em: 23 mar. 2026.