1, the pressure cooker should steam yam for about 5- 10 minutes.

2. The time of steaming yam should be adjusted according to the thickness of yam slices. If the yam slices are thin, they can be steamed in about 5-6 minutes. If it is a thick yam slice, it needs to be extended, usually 10 minutes.

3. Yam grows on hillsides, valleys and forests at an altitude of150-1500m, and in bushes or weeds along streams and roadsides. Yam is a short-day and warm-loving crop. The optimum temperature for seedling growth is 15-20℃. The optimum growth temperature is 25-28℃, and the growth is slow below 20℃. It is suitable to grow in loose, fertile and deep soil, while flat species and block species can also grow in shallow and viscous soil.