Вatatas is known also as sweet potatoes. The homeland of sweet potato are Peru and Colombia. The weight of a tuber of sweet potato can reach 10 kg. Sweet potato tubers are widely used in food. There are more useful properties in sweet potato than in potatoes. Depending on a sort of sweet potato can taste a banana with nut, just banana, pumpkin, a melon, nuts, vegetable marrows and even a chestnut. Tubers are used for production of sugar, flour, treacle and even alcohol. Leaves are added to salads, and seeds are used as a coffee substitute.