Research Article
Variety and Phosphate Rock Effects on Yield and Yield Components of Cowpea [Vigna unguiculata (L.) Walp.]
Department of Agricultural Science, Shehu Shagari College of Education, P.M.B. 2129, Sokoto, Nigeria
A. Singh
Department of Agricultural Science, Shehu Shagari College of Education, P.M.B. 2129, Sokoto, Nigeria
M. D. Magaji
Department of Agricultural Science, Shehu Shagari College of Education, P.M.B. 2129, Sokoto, Nigeria
M. S. Umar
Department of Crop Science, Usmanu Danfodiyo University, P.M.B. 2346, Sokoto, Nigeria