Abstract

Different ecological belts of Nepal are endowed with different types of climates due to its geographical locations
and physiography which is favourable for agricultural production, especially vegetable crops including root
and tuber (RandT) crops. Most of the important RandT crops of the world can be grown in Nepal and are the
engine of growth for rural economy and poverty alleviation. RandT crops possess a huge genetic diversity at
variety and landrace levels in Nepal. There are more than 30 edible and non-edible underutilized RandT crops
reported in the world and among them, taro, yam, cassava, elephant foot yam, ground apple and sweet potato
are the major cultivated RandT crops in Nepal. Despite the suitable climate, comparative advantages and great
contribution in food security the growth of domestic production and its value chain development has remained
slow in the past. Research work on root and tuber crop is inadequate and extension programme is almost
lacking. RandT crops are mostly perennial crops but they are also cultivated as an annual crop as they become
ready to harvest in 8-10 months. Suitable and productive varieties can be developed and expanded through the
propagation of these crops by collection, conservation and promotion of RandT crops which ultimately help to
improve the food security and nutrition.
Keywords: Climate, Conservation, Food security, Nutrition, Varieties