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In the mountainous regions of West Papua, sweet potatoes are the staple food among the natives there.ĥ. In Indonesia, sweet potatoes are locally known as ubi jalar and are frequently fried with batter and served as snack with spicy condiments, along with other kinds of fritters such as fried bananas, tempeh, tahu, breadfruits, or cassava. The Center for Science in the Public Interest ranked the nutritional value of sweet potatoes as highest among several other foods. When cooked by baking, small variable changes in micronutrient density occur to include a higher content of Vitamin C at 24% of the Daily Value per 100 g serving. The crop is sensitive to drought at the tuber stage 50-60 days after planting, and it is not tolerant to water-logging as it may cause tuber rots and reduce growth of storage roots if aeration is poor.īesides simple starches, raw sweet potatoes are rich in complex carbohydrates, dietary fiber, and beta-carotene, while having moderate contents of other micronutrients, including vitamin B and manganese.

Annual rainfalls of 750-1,000 mm are considered most suitable, with a minimum of 500 mm in the growing season. It grows best at an average temperature of 240C, abundant sunshine, and warm nights. In South America, Peruvian sweet potato remnants dating as far back as 8,000 BC have been found. In Central America, sweet potatoes were domesticated at least 5,000 years ago. The origin and domestication of sweet potato is thought to be in either Central America or South America. Its large, starchy, sweet-tasting, tuberous roots are a root vegetable. The sweet potato (Ipomoea batatas) is a dicotyledonous plant that belongs to the morning glory family Convolvulaceae. What happens when the funnel‘s narrow end touches the earth? Why does tornado happen? It happens when. They also commonly occur in Southern Canada, South-Central and Eastern Asia, East Central South America.Ģ. Most tornadoes have wind speeds, between 64 km/h and 179 km/h.Īlthough tornadoes have been observed on every continent except Antarctica most occur in the United States. This funnel’s narrow end touches the earth and is often encircled by a cloud of debris and dust. It is a funnel-shaped cloud of condensed water droplets, associated with a rotating column of wind and extending form the base of a cloud. Tornadoes come in many sizes but are typically in the form of a visible condensation funnel.

It is a result of atmospheric instability.

Cumulonimbus cloud is a type of cloud that is tall, dense, and involved in thunderstorms and other intense weather. It is a violent, dangerous, rotating column of air which is in contact with both the surface of the earth and a cumulonimbus cloud. The word tornado is from the Spanish word tronada, which means “thunderstorm”.

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