In fact, this method was introduced here in the 1970s, and it is called "sweet potato laying eggs". At that time, there was a slogan called "Sweet potato lays eggs, 10,000 Jin per mu". The specific method is as follows: first raise the ridge, about 25 cm high, and bury the sweet potato on the ridge. After the lower part takes root, gradually pull open the soil where the sweet potato is buried to expose the mother potato, and finally achieve full exposure. Just leave a proper amount of buds on it, and the rest can be used for cutting cultivation. If the mother potato is not pulled out, it will expand rapidly and eventually become hollow, and because there is too much fiber, the mother potato is not delicious.

Practice has proved that this cultivation method has higher yield, but the amount of seeds used has also increased several times, and the management is also labor-consuming, and it was later abandoned.