Division IV General background information

The following plot and tree parameters must be assessed on Level I points:

• for each plot:

  • descriptive code,

  • country,

  • date of observation,

  • observation point number,

  • actual latitude and longitude coordinates,

  • availability of water to principal species,

  • humus type,

  • altitude,

  • orientation,

  • stand data,

  • mean age of dominant storey,

  • soil data,

  • soil unit,

  • additional plot information specific for the current year (operations, events),

• for each tree in the plot:

  • plot number,

  • sample tree data:

  • tree number,

  • tree species,

  • defoliation,

  • discoloration,

  • damage due to easily identifiable causes (insect, fungi, abiotic agents…),

  • identification of damage type,

  • observations on the tree in the plot.

The following plot and tree information must be collected on Level II plots:

• country,

• plot number,

• date of assessment

• number of trees

• tree species

• orientation,

• information on removals and mortality,

• exposure,

• social class,

• crown shading,

• visibility.