AYISI, KINGSLEY K.NKGAPELE, RAMPHOPOTLE J.DAKORA, FELIX D.2020-02-122020-02-1220000334-5114http://hdl.handle.net/10222/77703Nodule Formation and Function in Six Varieties of Cowpea (Vigna unguiculata L. Walp.) Grown in a Nitrogen-Rich Field Soil in South AfricaText28117