“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.