Training of yam vines is important to increase photosynthesis. Training involves arranging the yam vines in a specific pattern on a trellis or support system, which helps to expose more leaves to sunlight. This results in an increase in photosynthesis, which is the process by which plants use sunlight to produce energy and food for growth. By increasing photosynthesis, yam plants can produce more and larger tubers, leading to increased yields. Additionally, training of yam vines can help to suppress weed growth by reducing competition for nutrients and sunlight. It can also make it easier to navigate through the farm during planting, weeding, and harvesting, as well as prevent rodent attacks by making it difficult for them to access the vines. Overall, training of yam vines is an important practice that can result in increased yields, improved plant health, and easier farm management.