RESPONSE OF COWPEA (Vigna unguiculataL.Walp) VARIETIES TO BRADYRHIZOBIAL STRAINS (USDA 3384 AND 3451) AND PHOSPHORUS LEVELS IN THE SUDAN SAVANNA OF NIGERIA.  

2017-01-01
Field trials were conducted during the 2015 wet season at the Bayero University Kano Teaching and Research Farm (110 58’N, 80 25’E and 475m above sea level) and National Institute ...