“  YIELD PERFORMANCE OF COWPEA VARIETIES (Vigna Unguiculata (L.) Walp) UNDER VARYING PLANT POPULATIONS AND PHOSPHORUS FERTILIZER RATES IN NIGERIAN SAVANNA ZONE”. 2026. FUDMA Journal of Agriculture and Agricultural Technology 12 (1): 144-54. https://doi.org/10.33003/jaat.2026.1201.17.