INFLUENCE OF MAIZE–COWPEA INTERCROPPING ON YIELD COMPONENTS AND PRODUCTIVITY OF IMPROVED COWPEA (VIGNA UNGUICULATA L. WALP) BREEDING LINES IN MAKURDI, NIGERIA. Journal of Enviromental Sciences and Built Environental Research, [S. l.], v. 1, n. 2, p. 369–375, 2026. DOI: 10.83374/jesber.vol1no2.71. Disponível em: https://jesber-unical.org.ng/index.php/home/article/view/71. Acesso em: 4 sep. 2026.