Effect of phosphorus (P) rates and weeding frequency on the growth and grain yield of extra early Cowpea (Vigna unguiculata L. Walp) in the forest-savanna agro-ecological zone of S... by Adeyemi Olusegun R., Ogunsola Kikelomo O., Olorunmaiye Patience M., Azeez Jamiu O., Hosu David O., Adigun Joseph A.

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