Edwin Kimutai Kanda, Aidan Senzanje, and Tafadzwanashe Mabhaudhi. “Effect of Moistube and Subsurface Drip Irrigation on Cowpea (Vigna Unguiculata (l.) Walp) Production in South Africa”. Water SA 46, no. 2 April (April 29, 2020). Accessed February 5, 2023. https://watersa.net/article/view/8234.