Potato (Solanum tuberosum) is also known as potatoes, yams, yam eggs and so on. Tubers can be eaten, is an important food, vegetables and crops, because of its rich nutrition has "underground apple" said.

Potato yield is high, strong adaptability to the environment, the main producing areas of potato in China is the southwest mountainous areas, northwest, Inner Mongolia and northeastern region. The southwest mountainous area has the largest sowing area, accounting for about 1/3 of the country's total area, and Heilongjiang Province is the largest potato planting base in the country.

When utilizing asexual reproduction of tubers, seed potatoes can sprout and grow under the condition of soil temperature of 5-8℃, and the optimum temperature is 15-20℃. Suitable for plant stem and leaf growth and flowering temperature of 16 to 22 ℃. The most suitable temperature for tuber formation at night is 10～13℃ (soil temperature 16～18℃), and the formation is slow when it is higher than 20℃. Soil and seedling stage in the temperature fell to -2 ℃ that is frozen.

Flowering and tuber formation for the whole life cycle in the period of maximum water demand, in case of drought, each irrigation 15 to 20 tons per mu is to ensure that the key technical measures to ensure high and stable yield of potato.

Potato generally in mu yield 1330 ~ 1650 kg of nitrogen absorption of about 6.65 ~ 11.65 kg, phosphoric acid 2.8 ~ 3.3 kg and potassium oxide 9.3 ~ 15.3 kg. Although potatoes can adapt to a variety of soils, but to loose and rich in organic matter (pH5.5-6.0) black soil is the most ideal. Density of seedlings per mu should not be less than 4000.

Yam

Yam is also known as yam, yam, yam medicine, Yan Zhang, Yu Yan and so on. China's consumption of yam has more than 3,000 years of history is known as a good tonic, highly praised. According to modern pharmacological analysis, yam is rich in starch, protein and choline, mucus and other ingredients.

The most important feature of yam is that it can supply the body with a large amount of mucus protein, which has a special health care effect on the human body, preventing fat deposition in the cardiovascular system, keeping the vascular atherosclerosis from occurring prematurely, and reducing the deposition of subcutaneous fat, to avoid the emergence of obesity.

So, yam is a kind of bodybuilding food. The people who want to lose weight can take the yam as a staple food, so that both can avoid due to dieting on the human body function to create damage, is conducive to achieve the purpose of weight loss.

Taro, also known as squatting owl and taro, etc., is the perennial herb taro underground penannular stems of plants in the family Amanita phalloides. Native to China and India, Malaysia and other tropical areas

Taro is also known as sweet potato, sweet potato, sweet potatoes, white potatoes, groundnuts, sweet potatoes.