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×published date:2015-Oct-30
FULL TEXT in - | page 23-26
Abstract
The ability of Sphenostylis stenocarpa (Harms) and Vigna unguiculata (L.) to grow and develop in spent carbide waste (SCW) polluted soil of different concentrations was investigated in Port Harcourt, Nigeria. Sphenostylis stenocarpa (Harms) and Vigna unguiculata (L.) are tropical food crops usually known as African Yam Bean (AYB) and Cowpea (CP) respectively. The experiment was arranged in Randomized Complete Block Design, replicated five times. Four levels (0 g, 50 g, 100 g and 150 g) of spent carbide were used. Plant height, stem girth, number of leaf and leaf area were measured and recorded on weekly interval. Average nodule, total fresh weight and total dry weight were determined 12 weeks after planting (WAP). The study revealed that spent carbide waste (SCW) adversely affected the morphology of the two crops, Sphenostylis stenocarpa and Vigna unguiculata resulting in significant (p < 0.05) reduction in plant height, leaf area, stem girth and number of leaf. Also, significant (p < 0.05) reduction in nodule count and bio-mass (total dry weight) in the two crops occurred when compared to their controls
Keywords: Pollution, Spend carbide waste (SCW), Sphenostylis stenocarpa, Vigna unguiculata,
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