Difference between General Volume Table & Local Volume Table

General Volume Table Local Volume Table
  • Table showing avg. ht, dia & volume
  • Assumption same avg ht & dia of specific species have same volume
  • Based on average volume of trees growing over a large geographic area
  • Applicable to a wide range of distribution of species
  • Based on usually more independent variable i.e. dbh, height, form
  • Has limited direct application
  • Used for deriving local volume tables
  • Prepared from felled trees
  • Confidence interval high i.e. less precise
  • Table showing avg. dia & volume
  • Assumption same avg ht have same avg dia of specific species & have same volume
  • Based on average volume of trees growing over a small restricted area
  • Applicable to a small area of species distribution
  • Based on one independent variable i.e. dbh
  • Directly applicable to a species designed for the area
  • Used for estimating volume of individual tree or stands
  • Can also be prepared from standing trees
  • Confidence interval low i. e. more precise

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