Khalid, A.-M., Ayamga, M. and Dans-Abbeam, G. 2019. ASSESSING THE PRODUCTIVE EFFICIENCY AMONG SMALLHOLDER COWPEA FARMERS IN NORTHERN GHANA. UDS International Journal of Development. 6, 1 (Jun. 2019), 44–61. DOI:https://doi.org/10.47740/340.UDSIJD6i.