Biomass Plot Library - Site Level Observation Attributes.

Field			|Format		|Description (units)
	
obs_key			|text		|Unique identifier for site and visit for data management purposes
source			|text		|Organisation from which the data was sourced
project			|text		|The project for which the data was acquired
site			|text		|Name of the site
estsurvey		|text		|Name of the survey that established the site
estdate			|date		|Start date of the site survey that established the site (a single site survey may span several days)
survey			|text		|Name of the site survey
obs_time		|date		|Start date of the site survey (a single site survey may span several days)
nplots			|integer	|Number of plots within the site
sampledarea_ha		|double		|Summed area of all plots (ha)
sitearea_ha		|double		|Site area (ha). sitearea_ha >= totalsubplotarea_ha
sitedmin		|double		|Minimum tree diameter measured in the site survey
[poly_]geom		|geometry	|Multipolygon, polygon, or point object of the plot footprint/s
longitude		|double		|Longitude of site centroid
latitude		|double		|Latitude of site centroid
live_basal_area		|double		|Live stand basal area (m2 ha-1)
dead_basal_area		|double		|Dead stand basal area (m2 ha-1)
live_stem_density	|double		|Live tree number density (n ha-1)
dead_stem_density	|double		|Dead tree number density (n ha-1)
agb_drymass_ha		|double		|Above-ground dry standing biomass density of trees/shrubs (Mg ha-1)
agb_drymass_se_ha	|double		|Above-ground dry standing biomass density standard error of trees/shrubs (Mg ha-1)
bgb_drymass_ha		|double		|Below-ground dry standing biomass density of trees/shrubs (Mg ha-1)
bgb_drymass_se_ha	|double		|Below-ground dry standing biomass density standard error of trees/shrubs (Mg ha-1)
tb_drymass_ha		|double		|Total dry standing biomass density of trees/shrubs (Mg ha-1)
tb_drymass_se_ha	|double		|Total dry standing biomass density standard error of trees/shrubs (Mg ha-1)
universal_agb		|double		|Fraction of above-ground dry standing biomass density predicted using the Universal allometric
universal_count		|double		|Fraction of individual plants that had the Universal allometric applied.
sizeclass		|double		|Lower bound of the 10cm diameter increment used to calculate the drymass values. Absence of this field indicates all size classes were included in the drymass values.