Effects of copper and vermicompost on growth and yield of cowpea (Vigna unguiculata L.) Walp and nutrient accumulation in its fruits. J. Biodivers. Conserv. Bioresour. Manag. [Internet]. 2020 Jan. 14 [cited 2026 Jun. 28];5(2):13-8. Available from: https://www.banglajol.info/index.php/jbcbm/article/view/44910