Mean Annual Increment (MAI) represents what aspect of growth?

Mean Annual Increment (MAI) represents what aspect of growth?

• A. Annual peak growth rate
• B. Mean annual growth across the tree's life
• C. Total harvest value
• D. Density of wood per year

Answer: (B)

Mean Annual Increment is the average growth the tree has produced per year over its entire life up to the current age. It’s calculated as the volume (or biomass) at age t divided by t, giving a smoothed measure of how much growth occurred each year since establishment. This isn’t the peak yearly growth (that would be the instantaneous rate at a specific age), nor a monetary value like total harvest value, nor a wood density figure. So it best describes the mean annual growth across the tree’s life.

Mean Annual Increment is the average growth the tree has produced per year over its entire life up to the current age. It’s calculated as the volume (or biomass) at age t divided by t, giving a smoothed measure of how much growth occurred each year since establishment. This isn’t the peak yearly growth (that would be the instantaneous rate at a specific age), nor a monetary value like total harvest value, nor a wood density figure. So it best describes the mean annual growth across the tree’s life.