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EFFECTS OF SIZE AND SPACING OF MINITUBERS ON YIELD OF THREE SELECTED YAM CULTIVARS IN THE HUMID TROPICS OF NIGERIA
Abstract
D.alata minitubers(6.91 t/ha) gave significantly (p=1%) higher seed yam tuber yield than the other two cultivars of D.rotundata,(2.08 t/ha for Abi and 1.99 t/ha for Obioturugo) irrespective of size of minituber or spacing used The results suggest that 50g minitubers should be spaced either 50cm apart on 1m ridges (4.63 t/ha) or 100cm apart (4.95 t/ha) while the 75g minitubers could be spaced at any of the three spacings evaluated (50cm=4.79 t/ha; 75cm=4.37 t/ha and 100cm=4.95 t/ha). Similarly, the 100g minitubers should be spaced at 75cm (4.95 t/ha) or at 50cm (4.74 t/ha).
[Niger Agric. J. 34 (2003): 58-62]
