Effects of cropping system and Cowpea variety (Vigna unguiculata L. Walp) on the diversity of native cowpea bradyrhizobia and millet yield in the Sudano Sahelian zone of Mali
Effects of cropping system and Cowpea variety (Vignaunguiculata L. Walp) on the diversity of native cowpeabradyrhizobia and millet yield in the Sudano Sahelianzone of Mali