“Effects of Anaerobically digested and undigested poultry manure on the growth and yield of maize (Zea mays, L)” (2012) International Journal of Manures and Fertilizers, 1(1), pp. 232–239. Available at: https://ijpp.org/journal/index.php/ijmf/article/view/259 (Accessed: 23 March 2026).