The age of a rubberwood tree with a log diameter of 8 inches can vary depending on various factors, including the growing conditions, climate, soil quality, and tree management practices. However, on average, a rubberwood tree typically reaches a diameter of 8 inches (approximately 20 cm) at around 10 to 15 years of age.
The age of a rubberwood tree with a log diameter of 5 inches (approximately 12.7 cm) can be estimated based on typical growth rates. Generally, a rubberwood tree reaches a diameter of 5 inches at around 5 to 10 years of age. This estimate can vary depending on several factors, including growing conditions, soil quality, and tree management practices.