HETEROTIC EFFECT OF TOMATO (Lycopersicon lycopersicum (L.) H. Karst) VARIETIES SUSCEPTIBLE TO ROOT-KNOT NEMATODE (MELOIDOGYNE SPP) IN SUDAN SAVANNA ZONE OF NIGERIA. (2022). FUDMA Journal of Agriculture and Agricultural Technology, 7(1), 72-79. https://jaat.fudutsinma.edu.ng/index.php/jaat/article/view/11