The cool potato, also known as bean and sweet potato, is a cultivar capable of forming roots in the genus Leguminosae. It is an annual or perennial entwined herbaceous vine. The roots of the cool potato are hypertrophic, and the meat is crisp and tender, rich in sugar and protein. It can be used as raw or cooked food. The seeds, stems and leaves contain rotenone, which are highly toxic to humans and animals and can be used as insecticides such as dichlorvos. First, soil selection. The edible part of the cool potato is underground roots. It is better to choose the deep soil, medium fertility, and dry sandy loam. Second, fine soil preparation, adequate base fertilizer. After the harvest of the previous crop, deep plowing 25 to 30 centimeters, apply 500 kilograms of plant ash and 1000 kilograms of pig manure per acre. 15 days before sowing, the soil blocks were broken and flattened to make a 1.2-1.3-meter wide sorghum. The sulcus was about 25 cm deep to facilitate drainage. Third, sowing. Due to the long period of growth of the cool potato, northern areas should be sown as soon as possible. Line spacing 20 to 25 centimeters, seeds 3 to 4 seeds per hole, planting and then covered with plant ash, about 2.5 kg per acre seed amount. Soybean seed coat is firm, soaked in warm water at 30°C for 3 to 4 hours before sowing, and placed at a temperature of 25°C to 30°C to germinate. Until the buds begin to sow, sowing. Fourth, and time seedlings, reasonable fertilization. Seedlings were unearthed 15 days after sowing. The first pair of basal leaves appeared after the emergence of seedlings, make up seedlings, leaving 1 to 2 seedlings per hole, and finally set a seedling. The film is punctured and the seedlings are filmed. The mulch film is tightly pressed at the base of the seedlings, and the seedlings must be promptly filled. Select the cloudy days to transplant the seedlings with soil. In the seedling stage, weeding and weeding should be done in time. Every time the soil is loosened, we should pour one-time human excrement to promote its early-onset growth. When the roots expand in mid-June, we will reapply a top dressing. In case of drought, pay attention to watering. Fifth, pruning and scaffolding. When the cool potato seedlings grow to a height of 30 cm, 1 hill bamboo is inserted per hole and the adjacent bean seedlings are tied together to allow the vines to climb onto the shelves. When the vine grows to more than 1 meter, it should be topped so as not to consume nutrients. In addition to the retention of the cool potato, the lateral branches and inflorescences appearing in each section must be removed in time to retain the leaves for photosynthesis, otherwise it will affect the expansion of the cool potato roots and reduce the yield and quality. Six, timely harvest. After 4 months of sowing of the cool potato, the tuberous roots have already swelled and the harvesting can start. However, the output is not high at this time. In order to obtain high yield, the harvest should be delayed for one month. However, if the collection is too late, it will reduce the quality. Therefore, it should be harvested in due course.
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