Forest Management Planning

Mean Diameter

READ THE INSTRUCTION & COMPLETE THE TASK

In forestry, the average diameter of a stand is conventionally referred to as quadratic mean diameter rather than the arithmetic mean stand diameter. The quadratic mean diameter is actually the diameter corresponding to the tree of arithmetic mean basal area.

YOUR TASK: Estimate the Quadratic Mean Diameter (QMD) of the Goettingen Forest standand calculate the precision of the estimate, using the given inventory data below.

References:
  • Curtis, R. O., and Marshall, D. D. 2000. Why quadratic mean diameter? Western Journal of Applied Forestry, 15(3): 137-139.
  • Kershaw, J. A., Ducey M. J., Beers T. W., Husch, B., 2017. Forest Mensuration 5th Edition. Chichester, UK.


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