FALODUN, E. J., & EGHAREVBA, R. (2018). Influence of Poultry Manure Rates and Spacing on Growth, Yield, Nutrient Concentration, Uptake and Proximate Composition of Onion (Allium cepa L.). Notulae Scientia Biologicae, 10(1), 117–123. https://doi.org/10.15835/nsb10110230