1、 How does it grow straight

Yam generally grows upright. If it doesn't grow straight, it means that there are some hard stones and gravel in the soil, which hinders its growth. Therefore, before planting, we must turn over the soil and take out the stones with large particles and hard texture, so as not to affect its development. Loose and fertile soil is more conducive to the growth of planting and its respiration

2、 How does it grow big

1. Light control: many plants cannot grow without sufficient light. For yam, it is necessary to provide light for a long time. Long illumination time is conducive to the growth of branches and leaves, but not conducive to the development of rhizomes. Generally, strong light should be used for irradiation, but the time should not be too long, which can accelerate the accumulation of nutrients and improve its quality

2. Proper fertilization: if yams want to grow well, they must provide a lot of nutrients, so they should be fertilized well. Fertilization is mainly based on base fertilizer. Generally, organic fertilizer or rotten farmyard fertilizer is selected, which can continuously provide nutrients. In the growth period, proper topdressing is required. In the early stage, nitrogen fertilizer is mainly used to promote the development of branches and leaves, and then compound fertilizer is applied to make the rhizome grow

3. Setting up a vine: yam is a vine. If it is not managed, it is easy to block the growth of each other, resulting in poor ventilation and daylighting of leaves and affecting its development. It is usually necessary to set up a support on it so that its vines can grow along the support, so as to ensure good air circulation and better exposure to the sun. The height of the support shall be 1.8-2.4m, and the minimum shall not be less than 1.6m