Chavarria Parraga, J.E. et al. 2020. Water requirements of cowpea (Vigna unguiculata (L.) Walp.). calculated with the cultivation coefficient using drainage lysimeter. Ciencia y Agricultura. 17, 3 (Sep. 2020), 111–121. DOI:https://doi.org/10.19053/01228420.v17.n3.2020.11746.