Aflakpui, G., Bolfrey-Arku, G., Allou, P., Dakurah, A. and Adu-Tutu, K. (1997) “Effect of rate and time of nitrogen fertilizer application on <i>Striga hermonthica</i> infestation in field-grown maize”, Ghana Journal of Agricultural Science, 30(2), pp. 127–133. doi: 10.4314/gjas.v30i2.1964.