The sites were selected subjectively to represent modal examples of the major habitat types in the H.J. Andrews area (usually with a mature and old growth example). Some stands (e.g.riparian) were selected for other reasons. The stands are remeasured at 5 to 10 year intervals to provide growth and regeneration information.
The stands are surveyed into 25 X 25 slope corrected subplots marked with permanent stakes. All trees greater than the minimum size (usually 5 cm dbh) are tagged, diametered, vigor coded, and mapped. The mapping is done using a 5 X 5 m grid formed with string as a guide. See attached sheet for details.