Forest DBH - Raw Data

The raw DBH (tree diameter at breast height) values from the forested sites, diameters are measured at 4 points along the trunk.

This datatable is part of the Forest Increment Survey dataset. In 1998, a new protocol was instituted for measuring the diameters of every tree greater than 5 cm dbh in the coniferous and deciduous forest plots. Trees are usually measured in January. Exponential equations are used to estimate tree mass for each year. The goal is to estimate wood production for any given time period (usually one year) as the difference between two estimates of mass.

Note

Experiment: Main Cropping System Experiment (MCSE)
Data available from: December 1998 to January 2017
Dataset: KBS045
Datatable ID: KBS019-017.49
Core Areas Primary Production,Populations,Disturbance
Related Tables:
Personnel:
Last Updated 2018-02-01
Variate Description Units
sample date day the tree was measured
year sample year (this is the year to which the sample is assigned, even if the actual sample date is in the following year)
treatment treatment sampled
replicate replicate sampled
tree id id of the tree sampled
species species sampled
color location of the dbh measurement
dbh diameter measured centimeter
estimated Set to true if the dbh has been estimated from the previous and following years.

Data Excerpt

sample_date year treatment replicate tree_id species color dbh estimated
2017-01-27 2016 CF 1 1428 Prunus serotina Ehrh. (*) white 5.6 f
2017-01-27 2016 CF 1 1428 Prunus serotina Ehrh. (*) red 5 f
2017-01-27 2016 CF 1 1428 Prunus serotina Ehrh. (*) orange 5.5 f
2017-01-27 2016 CF 1 1428 Prunus serotina Ehrh. (*) blue 5.6 f
2017-01-27 2016 CF 1 1427 Prunus serotina Ehrh. (*) white 5.3 f
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