@MANUAL {ONGOM:2024j, title = {Standard Operating Procedure (SOP) for land preparation and planting of cowpea}, author = {Ongom, P. O. and Togola, A. and Fatokun, C. and Mohammed, S. B. and Boukar, O. }, year = {2024}, organization = {International Institute of Tropical Agriculture}, address = {Ibadan, Nigeria}, note = {WAHub; Science Area BPB; CRP Grain Legumes; Cowpea; 6p.; Learning material}, }