Adeniyan O, Ojeniyi S. Effect of poultry manure, NPK 15-15-15 and combination of their reduced levels on maize growth and soil chemical properties. njss [Internet]. 2006 Aug. 22 [cited 2026 Nov. 8];15(1):34-41. Available from: https://www.ajol.info/index.php/njss/article/view/37444