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Physiological and Economic Implications of Leaf Harvesting on Vegetative Growth and Cormel Yield of Cocoyam (Xanthosoma sagittifolium)

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Author(s): H. Asumadu | E.L. Omenyo | F. Tetteh

Journal: Journal of Agronomy
ISSN 1812-5379

Volume: 10;
Issue: 4;
Start page: 112;
Date: 2011;
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Keywords: Cocoyam leaf | cormel | partial budget | net benefits | marginal rate of return

ABSTRACT
Cocoyam leaves contain a lot of minerals, vitamins, thiamine and proteins and are used as nutritious spinach in Ghana. The underground cormels which are the major economic part provide easily digestible starch and are often used as substitute for yams and plantains when these become scarce in the dry season. The objectives of the investigation was to determine the effect of leaf harvest on plant growth and cormel yield of cocoyam and also to determine the appropriate age or stage of crop development to start leaf harvest and frequency of harvesting that will result in optimum cormel yield. The stages or times harvesting of leaves began were 12, 16 and 20 Weeks After Planting (WAP) and the frequency of harvesting were 2, 3 and 4 weekly intervals. Delayed harvesting at 20 WAP produced significantly (p
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