“Effect of Method of Weed Control and Insecticide (Lambda-Cyhalothrin) Rates on the Productivity of Cowpea (Vigna Unguiculata (L) Walp) in a Southern Guinea Savanna of Nigeria”. Tropical Agriculture 95, no. 3 (October 8, 2018). Accessed May 29, 2024. https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/5383.