The Tropical Tuber Crops: Yams, Cassava, Sweet Potato, and Cocoyams |
Contents
Origin classification and growth cycle of the yam plant | 3 |
Planting | 5 |
Diseases and pests of | 8 |
Copyright | |
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3rd Int Agric alata boiling buds bulbils cassava cassava plant cassava tuber cayenensis cells cocoyam corm cormels Coursey cultivars cultivation develop Dioscorea esculenta disease dormancy double-harvesting dry season effective emergence esculenta farmer fertilizer field fresh tuber glucoside growing season grown growth hectare herbicides Ibadan infected intercrop kg hectare-ยน lamina large tubers layer leaf leaves Manihot Manihot esculenta mature mechanical harvesting method moisture mounds mulching nematode Nigeria nitrogen nodes occur Onwueme peeled periderm pests petiole phloem planting material plot potassium pounded yam presprouting problem propagation protein prussic acid rainy season regions relatively result ridges Root Crops root system rotting rotundata seed senescence setts shoot soil species sprouting staking starch stem storage stored surface sweet potato Symp tannia taro temperature tend tissue traditional agriculture tropics tuber formation tuber initiation usually vascular vine cuttings virus weed control West Africa xylem yam Dioscorea yam plant yam production yam tuber yield