Influence of microbial inoculants and phosphorus levels on root characters, growth and yield of vegetable cowpea (Vigna unguiculata subsp. sesquipedalis [L.] Verdcourt)
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Influence of microbial inoculants and phosphorus levels on root characters, growth and yield of vegetable cowpea (Vigna unguiculata subsp. sesquipedalis [L.] Verdcourt)