INFLUENCE OF MAIZE–COWPEA INTERCROPPING ON YIELD COMPONENTS AND PRODUCTIVITY OF IMPROVED COWPEA (VIGNA UNGUICULATA L. WALP) BREEDING LINES IN MAKURDI, NIGERIA. JESBER [Internet]. 2026 Sep. 15 [cited 2026 Sep. 16];1(2):369-75. Available from: https://jesber-unical.org.ng/index.php/home/article/view/84