• YAM (Dioscorea spp)
    AGRICULTURAL SCIENCE

    YAM (Dioscorea spp)

    Yam belongs to the family Dioscoreaceae. It is a root and tuber crop popularly grown in West Africa and it is rich in carbohydrates.   Land Preparation Cutlass is used to clear the bush or vegetation and heaps, ridges or mounds are made with hoe. It can also be done by ploughing, harrowing and ridging mechanically.   Varieties or Cultivars Important varieties include: Dioscorea rotundata – white yam. Dioscorea alata – water yam. Dioscorea bulbifera – aerial yam. Dioscorea cayenesis – yellow yam. Dioscorea domentorum – bitter yam.   Climate and soil requirements: Yam requires a temperature of 25°C – 30°C; rainfall of between 100cm -180cm per annum; abundant sunshine…

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